{"id":11437,"date":"2026-07-30T08:28:30","date_gmt":"2026-07-30T08:28:30","guid":{"rendered":"https:\/\/glassrock.com\/amber-glass-bottles\/"},"modified":"2026-07-30T09:32:11","modified_gmt":"2026-07-30T09:32:11","slug":"amber-glass-bottles","status":"publish","type":"post","link":"https:\/\/glassrock.com\/es\/amber-glass-bottles\/","title":{"rendered":"Amber Glass Bottles: Why Brown Glass Protects Your Product"},"content":{"rendered":"\n<style>.grx-fig{margin:1.8rem 0}.grx-fig svg,.grx-fig img{width:100%;height:auto;display:block;border-radius:8px}.grx-fig figcaption{font-size:.86rem;color:#4A5A54;margin-top:.5rem;line-height:1.45}.grx-prod{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem;margin:1.6rem 0}.grx-prod figure{margin:0;text-align:center}.grx-prod img{width:100%;height:auto;max-height:230px;object-fit:contain;background:#F1F4F2;border-radius:8px;padding:.5rem}.grx-prod figcaption{font-size:.85rem;margin-top:.45rem;line-height:1.35}.grx-rel{background:#F1F4F2;border:1px solid #C9D4CE;border-radius:8px;padding:1rem 1.3rem;margin:1.8rem 0}.grx-cta{background:#F1F4F2;border-left:4px solid #A9631F;border-radius:6px;padding:1.1rem 1.3rem;margin:1.8rem 0}.grx-tbl{overflow-x:auto;margin:1.4rem 0}.grx-tbl table{min-width:560px;border-collapse:collapse;width:100%}.grx-tbl th,.grx-tbl td{border:1px solid #C9D4CE;padding:.5rem .7rem;text-align:left;font-size:.92rem;line-height:1.45}.grx-tbl th{background:#1D3A31;color:#fff;font-weight:600}.grx-article{color:#233029}.grx-article h1{font-size:2.05rem;line-height:1.2;font-weight:800;color:#1D3A31;margin:.2rem 0 1.2rem}.grx-article h2{font-size:1.55rem;line-height:1.3;font-weight:700;color:#1D3A31;margin:2.6rem 0 .9rem;padding-top:.7rem;border-top:2px solid #E4EAE7}.grx-article h3{font-size:1.2rem;line-height:1.35;font-weight:700;color:#2F5C4E;margin:1.7rem 0 .5rem}.grx-article p{line-height:1.75;margin:0 0 1.2rem}.grx-article ul,.grx-article ol{margin:.3rem 0 1.4rem;padding-left:1.4rem}.grx-article li{margin-bottom:.6rem;line-height:1.65}.grx-article a{color:#A9631F !important;text-decoration:underline !important;text-underline-offset:2px;font-weight:700}.grx-article strong{color:#1D3A31}.grx-article nav[aria-label]{background:#F7F9F8;border:1px solid #C9D4CE;border-radius:8px;padding:.9rem 1.2rem 1rem;margin:1.6rem 0}.grx-article nav[aria-label] ul{margin:.2rem 0}.grx-article .grx-prod a,.grx-article .grx-rel a{color:#1D3A31 !important}.grx-article .grx-prod figcaption a{font-weight:600;text-decoration:none !important}@media(max-width:600px){.grx-prod{grid-template-columns:repeat(2,1fr)}.grx-article h1{font-size:1.7rem}.grx-article h2{font-size:1.35rem}}<\/style>\n<div class=\"grx-article\">\n<h1>Amber Glass Bottles: Why Brown Glass Protects Your Product<\/h1>\n<p><strong>Amber glass blocks about 99% of ultraviolet and blue-violet light below 450&nbsp;nm<\/strong> &mdash; the exact band that degrades light-sensitive products. That is why beer, pharmaceuticals, essential oils and natural cosmetics are packed in brown bottles: the colour is not decoration, it is a filter, created by adding iron and sulphur to the glass melt. This guide explains how the protection works, when amber is the right choice over green or clear glass, and what it means for cost and sustainability.<\/p><!--hero-inserted-->\n<figure style=\"margin:1.8rem 0\"><img src=\"\" alt=\"GlassRock glass packaging\" style=\"width:100%;height:auto;border-radius:8px;display:block\" loading=\"eager\" decoding=\"async\"><\/figure>\n\n<figure class=\"grx-fig\"><svg viewBox=\"0 0 880 316\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"img\" aria-label=\"How much light each glass colour blocks\"><style>text{font-family:system-ui,-apple-system,Segoe UI,sans-serif}<\/style><rect x=\"0\" y=\"0\" width=\"880\" height=\"328\" rx=\"10\" fill=\"#F1F4F2\"\/><text x=\"440.0\" y=\"36\" text-anchor=\"middle\" font-size=\"19\" font-weight=\"700\" fill=\"#1D3A31\">How much light each glass colour blocks<\/text><text x=\"440.0\" y=\"57\" text-anchor=\"middle\" font-size=\"12\" fill=\"#4A5A54\">Share of harmful UV and blue-violet light (300-450 nm) stopped before it reaches the product<\/text><text x=\"28\" y=\"104\" font-size=\"13\" font-weight=\"700\" fill=\"#1D3A31\">Amber<\/text><rect x=\"280\" y=\"87\" width=\"460\" height=\"26\" rx=\"4\" fill=\"#7a4a12\"\/><text x=\"750\" y=\"106\" font-size=\"12.5\" font-weight=\"700\" fill=\"#1D3A31\">~99 %<\/text><text x=\"28\" y=\"158\" font-size=\"13\" font-weight=\"700\" fill=\"#1D3A31\">Antique green<\/text><rect x=\"280\" y=\"141\" width=\"186\" height=\"26\" rx=\"4\" fill=\"#4E8271\"\/><text x=\"476\" y=\"160\" font-size=\"12.5\" font-weight=\"700\" fill=\"#1D3A31\">partial<\/text><text x=\"28\" y=\"212\" font-size=\"13\" font-weight=\"700\" fill=\"#1D3A31\">Flint (clear)<\/text><rect x=\"280\" y=\"195\" width=\"37\" height=\"26\" rx=\"4\" fill=\"#8FB3A4\"\/><text x=\"327\" y=\"214\" font-size=\"12.5\" font-weight=\"700\" fill=\"#1D3A31\">almost none<\/text><rect x=\"28\" y=\"250\" width=\"824\" height=\"52\" rx=\"6\" fill=\"#fff\" stroke=\"#C9D4CE\" stroke-width=\"1.5\"\/><text x=\"44\" y=\"270\" font-size=\"12\" font-weight=\"700\" fill=\"#A9631F\">Amber is the only standard colour that closes the 300-450 nm window.<\/text><text x=\"44\" y=\"287\" font-size=\"10.4\" fill=\"#4A5A54\">That band drives UV degradation of oils, vitamins, hop compounds and actives. Iron and sulphur in the amber melt absorb it almost completely.<\/text><\/svg><figcaption>The 300&ndash;450&nbsp;nm band is where photodegradation happens. Amber closes it almost completely; clear glass leaves it wide open.<\/figcaption><\/figure>\n<nav aria-label=\"Table of contents\"><ul>\n<li><a href=\"#how\">How amber glass blocks light<\/a><\/li>\n<li><a href=\"#beer\">Beer: the famous case of the skunked bottle<\/a><\/li>\n<li><a href=\"#uses\">What else belongs in amber<\/a><\/li>\n<li><a href=\"#vs\">Amber vs green vs clear glass<\/a><\/li>\n<li><a href=\"#cost\">Cost, recycling and sustainability<\/a><\/li>\n<li><a href=\"#brand\">Branding in brown: the apothecary effect<\/a><\/li>\n<li><a href=\"#faq\">Frequently asked questions<\/a><\/li>\n<\/ul><\/nav>\n<h2 id=\"how\">How amber glass blocks light<\/h2>\n<p>Amber is not a coating or a tint applied afterwards &mdash; the colour is built into the glass chemistry. During melting, <strong>iron, sulphur and carbon<\/strong> form iron-sulphide chromophores distributed through the material. These absorb light selectively: wavelengths from roughly <strong>300 to 450&nbsp;nm<\/strong> &mdash; ultraviolet plus violet-blue visible light &mdash; are soaked up before they reach the contents, while longer wavelengths pass and give the glass its brown appearance. The details of how colour enters the melt are covered in <a href=\"\/how-glass-bottles-are-made-the-full-production-process\/\">how glass bottles are made<\/a>.<\/p>\n<p>Why does that band matter? Because photochemical damage is not caused by light in general but by <strong>high-energy photons<\/strong>, and in packaging terms that means UV and blue-violet. Those photons break down hop compounds, oxidise oils, destroy vitamins B2 and B12, and degrade many pharmaceutical actives. Filter the band, and the reactions largely stop.<\/p>\n<h2 id=\"beer\">Beer: the famous case of the skunked bottle<\/h2>\n<p>The best-documented example is beer. When light in the 350&ndash;500&nbsp;nm range strikes beer, it triggers a photoreaction in iso-alpha acids from the hops, producing <strong>3-methyl-2-butene-1-thiol (MBT)<\/strong> &mdash; a compound chemically related to what a skunk sprays, detectable by the human nose at parts per trillion. The result is the &ldquo;lightstruck&rdquo; or skunky flavour, and it can develop in minutes of direct sunlight.<\/p>\n<p>Amber glass prevents it almost entirely; green glass only partially, which is why some famous green-bottled lagers have a recognisable lightstruck note that consumers have learned to accept; clear glass offers no protection at all, which is why clear-bottled beers typically use modified hop extracts that cannot form MBT. The full format landscape is in our <a href=\"\/beer-bottle-sizes\/\">beer bottle size guide<\/a>.<\/p>\n<h2 id=\"uses\">What else belongs in amber<\/h2>\n<ul>\n<li><strong>Pharmaceuticals.<\/strong> Pharmacopoeias require light-resistant containers for many actives; amber glass is the default answer, from syrup bottles to tablet jars.<\/li>\n<li><strong>Essential oils and aromatherapy.<\/strong> Terpenes oxidise rapidly under UV; virtually the entire industry ships in amber (or cobalt) <a href=\"\/dropper-bottle-sizes\/\">dropper bottles<\/a>.<\/li>\n<li><strong>Natural cosmetics and serums.<\/strong> Vitamin C, retinol and plant actives are light-sensitive; amber protects the formula and signals &ldquo;natural&rdquo; on the shelf.<\/li>\n<li><strong>Cold-pressed juices, kombucha, oils.<\/strong> Unrefined products keep their colour and nutrients longer behind amber.<\/li>\n<li><strong>Chemicals and lab reagents.<\/strong> The classic brown Winchester bottle exists for the same reason as the beer bottle.<\/li>\n<\/ul>\n<h2 id=\"vs\">Amber vs green vs clear glass<\/h2>\n<figure class=\"grx-fig\"><svg viewBox=\"0 0 900 434\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"img\" aria-label=\"Amber vs green vs flint: choosing a bottle colour\"><style>text{font-family:system-ui,-apple-system,Segoe UI,sans-serif}<\/style><rect x=\"0\" y=\"0\" width=\"900\" height=\"434\" rx=\"10\" fill=\"#F1F4F2\"\/><text x=\"450.0\" y=\"34\" text-anchor=\"middle\" font-size=\"18.5\" font-weight=\"700\" fill=\"#1D3A31\">Amber vs green vs flint: choosing a bottle colour<\/text><rect x=\"155\" y=\"52\" width=\"190\" height=\"30\" rx=\"6\" fill=\"#fff\" stroke=\"#C9D4CE\" stroke-width=\"1.5\"\/><text x=\"250\" y=\"72\" text-anchor=\"middle\" font-size=\"12.5\" font-weight=\"700\" fill=\"#A9631F\">Amber<\/text><rect x=\"375\" y=\"52\" width=\"190\" height=\"30\" rx=\"6\" fill=\"#fff\" stroke=\"#C9D4CE\" stroke-width=\"1.5\"\/><text x=\"470\" y=\"72\" text-anchor=\"middle\" font-size=\"12.5\" font-weight=\"700\" fill=\"#A9631F\">Antique green<\/text><rect x=\"595\" y=\"52\" width=\"190\" height=\"30\" rx=\"6\" fill=\"#fff\" stroke=\"#C9D4CE\" stroke-width=\"1.5\"\/><text x=\"690\" y=\"72\" text-anchor=\"middle\" font-size=\"12.5\" font-weight=\"700\" fill=\"#A9631F\">Flint (clear)<\/text><text x=\"24\" y=\"116\" font-size=\"11.8\" font-weight=\"700\" fill=\"#1D3A31\">Light blocked<\/text><text x=\"250\" y=\"116\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">~99 % below 450 nm<\/text><text x=\"470\" y=\"116\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Partial<\/text><text x=\"690\" y=\"116\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Essentially none<\/text><line x1=\"24\" y1=\"128\" x2=\"876\" y2=\"128\" stroke=\"#C9D4CE\" stroke-width=\"1\"\/><text x=\"24\" y=\"160\" font-size=\"11.8\" font-weight=\"700\" fill=\"#1D3A31\">Best for<\/text><text x=\"250\" y=\"160\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Beer, pharma, oils, actives<\/text><text x=\"470\" y=\"160\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Wine, olive oil<\/text><text x=\"690\" y=\"160\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Spirits, water, cosmetics<\/text><line x1=\"24\" y1=\"172\" x2=\"876\" y2=\"172\" stroke=\"#C9D4CE\" stroke-width=\"1\"\/><text x=\"24\" y=\"204\" font-size=\"11.8\" font-weight=\"700\" fill=\"#1D3A31\">Shows the product<\/text><text x=\"250\" y=\"204\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">No<\/text><text x=\"470\" y=\"204\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Tinted<\/text><text x=\"690\" y=\"204\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Perfectly<\/text><line x1=\"24\" y1=\"216\" x2=\"876\" y2=\"216\" stroke=\"#C9D4CE\" stroke-width=\"1\"\/><text x=\"24\" y=\"248\" font-size=\"11.8\" font-weight=\"700\" fill=\"#1D3A31\">Recycled cullet tolerance<\/text><text x=\"250\" y=\"248\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">High (60-90 %)<\/text><text x=\"470\" y=\"248\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">High<\/text><text x=\"690\" y=\"248\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Lower<\/text><line x1=\"24\" y1=\"260\" x2=\"876\" y2=\"260\" stroke=\"#C9D4CE\" stroke-width=\"1\"\/><text x=\"24\" y=\"292\" font-size=\"11.8\" font-weight=\"700\" fill=\"#1D3A31\">Relative cost<\/text><text x=\"250\" y=\"292\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Low<\/text><text x=\"470\" y=\"292\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Low<\/text><text x=\"690\" y=\"292\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Slightly higher<\/text><line x1=\"24\" y1=\"304\" x2=\"876\" y2=\"304\" stroke=\"#C9D4CE\" stroke-width=\"1\"\/><text x=\"24\" y=\"336\" font-size=\"11.8\" font-weight=\"700\" fill=\"#1D3A31\">Shelf signal<\/text><text x=\"250\" y=\"336\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Apothecary, craft, natural<\/text><text x=\"470\" y=\"336\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Traditional, gourmet<\/text><text x=\"690\" y=\"336\" text-anchor=\"middle\" font-size=\"11\" fill=\"#2F5C4E\">Pure, premium, clean<\/text><line x1=\"24\" y1=\"348\" x2=\"876\" y2=\"348\" stroke=\"#C9D4CE\" stroke-width=\"1\"\/><rect x=\"24\" y=\"368\" width=\"852\" height=\"46\" rx=\"6\" fill=\"#fff\" stroke=\"#C9D4CE\" stroke-width=\"1.5\"\/><text x=\"40\" y=\"387\" font-size=\"11.8\" font-weight=\"700\" fill=\"#A9631F\">The decision rule is simple.<\/text><text x=\"40\" y=\"404\" font-size=\"10.3\" fill=\"#4A5A54\">If light degrades your product, amber. If presentation sells it, flint. Green sits between, chosen mostly by tradition.<\/text><\/svg><figcaption>The three standard colours compared. The right choice depends on whether light or looks is the bigger commercial risk.<\/figcaption><\/figure>\n<p>One nuance worth adding: <strong>clear glass with a UV coating or sleeve<\/strong> exists as a middle path, and premium spirits sometimes use it. But coatings add cost and complexity, and none matches the built-in, permanent protection of true amber. If the product is genuinely light-sensitive, colour in the glass beats treatment on the glass. For the high-clarity end of the spectrum &mdash; where showing the liquid is the whole point &mdash; see our guide to <a href=\"\/flint-glass-grades-bottle-production\/\">flint glass grades<\/a>.<\/p>\n<h2 id=\"cost\">Cost, recycling and sustainability<\/h2>\n<p>Amber has a quiet economic advantage: it is one of the cheapest glasses to make sustainably. Because colour contamination barely shows in a dark melt, amber furnaces run on <strong>60&ndash;90% recycled cullet<\/strong>, far more than flint tolerates. More cullet means lower melting energy and lower CO<sub>2<\/sub> &mdash; every 10% of cullet cuts furnace energy by roughly 2.5%. Amber bottles are also fully recyclable in standard glass streams, and colour-sorted amber cullet is in steady demand.<\/p>\n<p>For a buyer, this shows up as: amber standard ware is typically <strong>no more expensive than flint, often cheaper<\/strong>, widely available in stock shapes, and easier to defend in a sustainability audit.<\/p>\n<h2 id=\"brand\">Branding in brown: the apothecary effect<\/h2>\n<p>Amber imposes one real constraint &mdash; the customer cannot see the product &mdash; and brands have turned it into an aesthetic. The &ldquo;apothecary look&rdquo; (amber bottle, minimal label, black or aluminium cap) now signals <em>craft, natural, scientific<\/em> across cosmetics, coffee, and beverages. Decoration works differently on dark glass: white and metallic <a href=\"\/glass-bottle-decoration-techniques-methods-explained\/\">screen printing<\/a> pops, transparent labels disappear, and embossing reads as premium. If your brand needs the protection but not the look, remember the constraint runs one way only: you can always make amber beautiful, but you cannot make clear glass protective.<\/p>\n<h2 id=\"faq\">Frequently asked questions<\/h2>\n<h3>What does amber glass protect against?<\/h3>\n<p>Ultraviolet and blue-violet light between roughly 300 and 450&nbsp;nm &mdash; the high-energy band that drives photodegradation. Amber blocks about 99% of it, protecting hop compounds, oils, vitamins and pharmaceutical actives from breaking down.<\/p>\n<h3>Why are beer bottles brown?<\/h3>\n<p>Because light in the 350&ndash;500&nbsp;nm range reacts with hop-derived iso-alpha acids to form MBT, the &ldquo;skunky&rdquo; off-flavour compound. Brown glass blocks that band almost completely; green blocks it partially; clear not at all.<\/p>\n<h3>Is amber glass more expensive than clear glass?<\/h3>\n<p>No &mdash; usually the opposite for standard ware. Amber melts tolerate very high recycled-cullet ratios (60&ndash;90%), which lowers energy cost, and amber stock bottles are produced at enormous volume.<\/p>\n<h3>Does amber glass block all UV?<\/h3>\n<p>It blocks about 99% of UV below 450&nbsp;nm, which covers the wavelengths that matter for product degradation. No container glass blocks absolutely everything, and very long light exposure still warms the product &mdash; dark storage remains best practice for sensitive goods.<\/p>\n<h3>Amber or cobalt blue &mdash; which protects better?<\/h3>\n<p>Amber, clearly. Cobalt blue blocks some UV but transmits much of the violet-blue band, because blue glass by definition lets blue light through. Cobalt is chosen for aesthetics; amber is chosen for protection.<\/p>\n<h3>Can amber glass be recycled?<\/h3>\n<p>Yes, fully, in standard glass recycling. Colour-sorted amber cullet feeds straight back into amber production, where it substitutes for a larger share of the batch than cullet can in clear glass.<\/p>\n<h3>Do essential oils have to be in amber bottles?<\/h3>\n<p>They should be in UV-protective glass &mdash; amber is the standard, cobalt an alternative with weaker protection. Citrus and conifer oils in particular oxidise quickly under light, changing scent and skin-safety profile.<\/p>\n<aside class=\"grx-cta\">\n<p><strong>Sourcing amber glass bottles or jars?<\/strong><br>\nGlassRock manufactures amber containers for beer, pharma, oils and cosmetics &mdash; stock ranges and custom moulds, with high recycled content. Tell us your product, capacity, closure and volumes.<\/p>\n<p><a href=\"\/contact\/\">Talk to our team<\/a> &middot; <a href=\"\/shop\/\">Browse the catalogue<\/a><\/p>\n<\/aside>\n\n<h2>Amber and dark glass by GlassRock<\/h2>\n<div class=\"grx-prod\">\n<figure><a href=\"https:\/\/glassrock.com\/product\/500ml-dark-brown-beer-bottle-large\/\"><img src=\"https:\/\/glassrock.com\/wp-content\/uploads\/2025\/11\/500ml-Dark-Brown-Beer-Bottle-Large.png\" alt=\"500 ml Dark Brown Beer Bottle by GlassRock\" loading=\"lazy\" decoding=\"async\"><\/a><figcaption><a href=\"https:\/\/glassrock.com\/product\/500ml-dark-brown-beer-bottle-large\/\">500 ml Dark Brown Beer Bottle<\/a><\/figcaption><\/figure>\n<figure><a href=\"https:\/\/glassrock.com\/product\/oslo-700\/\"><img src=\"https:\/\/glassrock.com\/wp-content\/uploads\/2025\/09\/OSLO-700.png\" alt=\"Oslo 700 by GlassRock\" loading=\"lazy\" decoding=\"async\"><\/a><figcaption><a href=\"https:\/\/glassrock.com\/product\/oslo-700\/\">Oslo 700<\/a><\/figcaption><\/figure>\n<figure><a href=\"https:\/\/glassrock.com\/product\/rhum-1l\/\"><img src=\"https:\/\/glassrock.com\/wp-content\/uploads\/2025\/07\/Rhum-1L-Liquor-bottle.png\" alt=\"Rhum 1L by GlassRock\" loading=\"lazy\" decoding=\"async\"><\/a><figcaption><a href=\"https:\/\/glassrock.com\/product\/rhum-1l\/\">Rhum 1L<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n<div class=\"grx-rel\">\n<h2>Related guides<\/h2>\n<ul>\n<li><a href=\"\/how-glass-bottles-are-made-the-full-production-process\/\">How glass bottles are made: the complete production process<\/a><\/li>\n<li><a href=\"\/beer-bottle-sizes\/\">Beer bottle sizes: every format in mL and ounces<\/a><\/li>\n<li><a href=\"\/flint-glass-grades-bottle-production\/\">The different grades of flint glass in bottle production<\/a><\/li>\n<li><a href=\"\/what-is-borosilicate-glass\/\">What is borosilicate glass? Properties and uses<\/a><\/li>\n<li><a href=\"\/is-glass-microwave-oven-freezer-safe\/\">Is glass microwave, oven and freezer safe?<\/a><\/li>\n<li><a href=\"\/dropper-bottle-sizes\/\">Dropper bottle sizes and how many drops per ml<\/a><\/li>\n<\/ul>\n<\/div>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Amber glass blocks about 99% of UV and blue-violet light below 450 nm. How the protection works, the beer lightstruck story, amber vs green vs clear, and cost and recycling advantages.<\/p>","protected":false},"author":1,"featured_media":11375,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-11437","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":{"banner_image":null,"title_on_banner":"","Premiere_image":null,"Bloc_texte_1":"","Bloc_texte_2":"","seconde_image":null,"Bloc_texte_3":"","Bloc_texte_4":"","troisieme_image":null,"Bloc_texte_5":"","product":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Amber Glass Bottles: UV Protection Explained (2026)<\/title>\n<meta name=\"description\" content=\"Why amber glass blocks ~99% of UV and blue light below 450 nm, 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