You will receive (2) SodaStream Glass Carafe. For carbonating with Aqua Fizz, Penguin and Crystal machines only! Spare glass carafes for Penguin and Crystal machine owners. If you have a Fountain Jet, Edition 1 or Design machine you can add a 'touch of glass' by carbonating your drinks in the PET bottles (BPA-free!) that came with your soda maker, then transferring your carbonated drink to these elegantly crafted glass carafes for serving and storage. Each bottle holds 620ml and comes with a fizz-preserving closure. Dishwasher-safe. NOTE: The manufacturer has updated the top of the carafe. The updated version has a screw-on top, while the old version has a slide-on top. Neither style top effects the quality or usage of the carafe.