Love it! I can now make my coffee at home, take it on the train and then collapse the cup to fit in my handbag instead of carrying a solid thermos cup or wasting money (and resources) by purchasing coffee to take away every day. It doesn't leak at all, (although my thermos cups from a major coffee chain always did) and I haven't had any problems with my Stojo. I've just bought three more as gifts!

This is a great product. Got it for camping but seem to be using it every day. Ended up getting two more for my son and wife. I am particularly happy that they added the separate ring to add stability!

I love my stojo cups. This collapsible cup fits well into many aspects of my life. I can store the cups in my purse or my backpack. I wash my cups in the dishwasher, so they are very easy to clean. I remember having a collapsible cup as a child at summer camp and so this cup is nostalgic. I definitely recommend the stojo cups. It's a perfect addition to a picnic.

It is genuinely "leak-proof" (within reason) so much so that I often leave the last swig of coffee in the bottom segment of the cup - that way 2 hours later, I've got a half of shot of black coffee to enjoy! I'd give the design and company a 10/10!