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

First, I like how the cup collapses in two stages. If you want a squat coffee cup (like the ones you'd typically get for a small Starbucks coffee), you leave the bottom stage collapsed. If you want a tall cup, like a grande coffee or medium soda, you expand out the middle and the bottom sections. Also, what's not clear is that you can pull off the two outer white rings (the one just under the lid and the one in the middle). All components can then be easily washed (I put it in the dishwasher with no problem). You're left with the two white rings, the lid, and just the silicone "shell" of the cup to wash. Super easy to clean and it actually gets clean. I've had a ton of travel mugs that were leak proof but got filthy because their mechanisms were complex and hard to get into. I used the mug on a very long drive and it was great. Easily fit into car cup holders (on middle console and in the door cup holders). One point is that when drinking from the small hole in the lid, the sides do suck in a bit. At first that seemed a bit funny but it works well and snapping the silicone tab into the single hole provides a strong, and best as I can tell so far, a drip-proof seal. The only thing I would mention is that the cup can stand up on its on when fully extended on a flat surface. That being said, the bottom is silicone, flexible and has slightly rounded edges. In most situations that's fine but banging a table or desk hard could knock it over. Don't really see that as a big negative given its intended uses.