{"product_id":"1-gallon-glass-demijohn","title":"1 Gallon Glass Demijohn (4.5 litres)","description":"\u003ch2\u003eTraditional Glass Demijohn — 4.5L UK Gallon\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003e1 gallon glass demijohn\u003c\/strong\u003e bottles are a staple for small-batch fermentation. With a narrow neck and twin-handled design, this traditional UK-style demijohn is ideal for maturing homemade wine, mead, cider, and more.\u003c\/p\u003e\u003cp\u003eUnlike large carboys, the compact 4.5L capacity is well suited for experimental or seasonal brews. The narrow neck helps reduce oxygen exposure during fermentation or storage.\u003c\/p\u003e\u003cp\u003eUse with a bored bung and airlock for active fermentation, or seal with a solid stopper when aging.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eWhat Is a 1 Gallon Glass Demijohn?\u003c\/h3\u003e\u003cp\u003eA 1 gallon demijohn is a clear glass vessel used by homebrewers to ferment and store beverages like wine and mead. It holds 4.5 litres to the shoulder and features a traditional bulb shape with twin glass handles for easy carrying.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 4.5L (UK 1 gallon)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Clear glass with integrated handles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck:\u003c\/strong\u003e Suitable for standard demijohn bungs and airlocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Approx. 32cm height x 18cm diameter (56cm circumference)\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eWhy Choose a Glass Demijohn?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNon-reactive — won't affect flavour or colour\u003c\/li\u003e\n\u003cli\u003eFully transparent — monitor clarity and fermentation progress\u003c\/li\u003e\n\u003cli\u003eCompact size — great for testing recipes or small quantities\u003c\/li\u003e\n\u003cli\u003eTraditional look — ideal for gifting or classic-style winemaking\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eCompatible With\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRubber bungs\u003c\/strong\u003e — for sealing or attaching airlocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirlocks\u003c\/strong\u003e — allow CO₂ release during active fermentation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid stoppers\u003c\/strong\u003e — seal the vessel during aging\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWine making\u003c\/strong\u003e — mature red, white, or fruit wines in small batches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMead fermentation\u003c\/strong\u003e — traditional honey wine brewing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCider brewing\u003c\/strong\u003e — perfect for seasonal apple or pear ferments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSplit batches\u003c\/strong\u003e — ideal for experimenting with yeast or adjuncts\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eBrewer's Tip\u003c\/h3\u003e\u003cp\u003eAlways leave at least 5cm of headspace when filling to allow for foaming during fermentation. Once fermentation is complete, switch from an airlock to a solid bung to limit oxygen exposure during aging.\u003c\/p\u003e","brand":"Hambleton Bard","offers":[{"title":"Default Title","offer_id":52616119189847,"sku":"2847","price":12.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0979\/5495\/5607\/files\/glass_demijohn.jpg?v=1777555934","url":"https:\/\/www.home-brew-hopshop.co.uk\/products\/1-gallon-glass-demijohn","provider":"The Hop Shop","version":"1.0","type":"link"}