Brewing Supplies Online offers Mr Beer, Black Rock, Morgan's, Cooper's, Mangrove Jack's, and Thomas Cooper's Craft beer kits as an essential feature for its homebrew supplies. The body of homebrew kits make approximately 23 litres when additional additives are used. To achieve a full flavoured beer the homebrewer can: use two cans to produce a beer exactly as the craft brewer intended: often dubbed by brewers as a "Toucan" beer. Alternatively the brewer may add 1kg of powdered brewing malt or at least 1.2kg of liquid malt to their beer kit to produce a beer based on their beer kit malt. The exception is Mr Beer American Craft Series which does not require other additives. The volume produced by a beer kit may vary between manufacturers.