FoFoCup Collapsible Travel To-Go Tumbler Cup - lightweight, reusable, foldable, 16 oz

Bought this as a gift. The yellow is not as bright as it looks in the photo. I bought it as a gift. Hopefully the birthday girl will enjoy it.

I wanted a collapsible or foldable cup for my backpacking supplies. I ordered four of these. Three arrived. Four times, we opened and closed the cup, adimring the clever design. Then we filled it with water. Leaked at two corners. I'm sending them back.