This Collapsible Silicone Cup is made from non-toxic, FDA approved premium food-grade silicone. It has a good capacity of 395ml, a perfect size for your favourite cuppa. When not in use, it collapses in one easy stroke to less than 1/2 its full size making it handy to carry with you everywhere you go. Suitable for all hot and cold beverages, its generous sized heat holder makes it comfortable for you to hold your drink on the go. Leak-proof once secured with screw cap and silicone stopper.Usage tips – Remove silicone stopper before extending or collapsing the cup to allow easy air flow. To collapse, slam cup in a single firm stroke on any hard surface.