Here is a neat collapsible bottle that you can take with you anywhere to stay hydrated. The que Bottle collapses to 4.8″, so you won’t have trouble fitting it in your bag. It has a kitchen-grade stainless steel cap and an air-seal locking mechanism. que can hold cold and hot drinks up to 140F.
The makers are offering this bottle in 20 fl oz and 12 fl oz versions. These bottles are shockproof and made of 100% food-grade silicone.