Plastic, 0.5 L
From Amazon
SodaStream My Only Bottle, 500ml Fizzy Drink Bottle & Reusable Water Bottle fits our Retro Drinks Sparkling Water Makers, BPA Free, Dishwasher Safe Refillable Bottle - 1x Bottle 0.5L, Black
Robert Dyas
SodaStream 1/2 Litre "My Only" Bottle - Pink Blush