Review on Portable Stainless Steel Camping Mug - Collapsible Cup with Keychain, Ideal for Outdoor Travel, Demountable Design, 75ml 150ml 250ml (L) by Dan Barrett

This mug (I'm a medium size) is not what I was hoping for. First, it's quite difficult to separate the two parts (cup and lid). I broke my nail polish doing this and I think it would be really hard if your hands weren't completely clean. I think the good news is that the two pieces don't easily separate when packaged. Even when the cup is separate and in the folded state, the cup's rings (the parts that connect to collapse or make the cup into a cup) are quite sharp. I wouldn't want a kid fainting holding this mug. Haven't used it yet; assume it works; but too many bugs to be really good.