Keep water and sodas fizzy while on the go with the SodaStream 1 liter Source Carbonating Bottle This pack consists of two bottles each with a 1 liter capacity. These 1 liter carbonating bottles from SodaStream can maintain water and soda fizziness for up to two weeks. In their lifetime of usage each container will replace more than 2500 cans and bottles from store-bought drinks making them an eco-friendly and cost-effective accessory. Allowing for easy viewing of the liquid level inside.