Review on IGreely Collapsible Silicone Folding Cup/Mug With Lids - Portable & Lightweight Travel Mug For Camping Hiking Outdoors - Gray by Isaac Shankar

So, the good first. This is a collapsible cup that will easily fit in a travel bag for coffee on the go. It's easy to clean. It's a decent size when pulled out all the way.The bad: When completely opened the bottom isn't super stable. When I put the cup down it sort of bounces, it hasn't collapsed yet, but I feel like the bottom needs to be larger. Additionally, when you put the lid on you have to be extra careful that the silicone part of the cup is all the way around the white rim. Part of the silicone had slipped under the rim so it randomly started leaking everywhere if tilted the wrong way, squeezed, sat down, or when I drank from it. The lid was on correctly, so the only way I figured out what happened was to take it off, which also made a huge mess because coffee had collected on the inside of the lid/rim. Coffee got EVERYWHERE. This makes me nervous to have someone else fill my cup at a coffee shop on the occasion that they aren't diligent, and I take a sip of hot coffee to have it spill all over me.So I guess buyer beware, if you're willing to work with it, it's probably a good option. I'm personally disappointed I can't return it.