Draft Brewer® New Ball Lock Keg - 2.5 GallonBrand new 2. 5 gallon stainless keg with ball lock fittings and pressure relief valve in the lid. These mini kegs are perfect for bringing beer to a party, keeping in your normal fridge, or sending some home with a buddy. Keg half of a batch to enjoy immediately and bottle the rest of it to cellar age for later. Use it to keg smaller test batches without wasting CO2 on a partially filled 5 gallon keg. In bigger kegerators and keezers, small kegs can