トレーリングランニング、アウトドアマラソン、サイクリング用の折りたたみ式TPUソフトウォーターカップ--SPEEDCUP™

These cups are very compact when folded up, and they are incredibly light.
They aren't huge, but that's perfect for those "cup-less" races where you just need something small to get some water in you in the middle of a race.
I don't plan on using the carabiners that came with them, but I guess they are there if you wanted to use them.

These are a must have for hiking and camping. They are so light weight and easy to carry. They hold liquid really well. They tend to be a little wobbly if you set them on a table, but that isn’t really what these are for. They attach easily to a loop on your pack with the included carabiners. They are very easy to clean and they fold/smash down easily as well. Plus, they aren’t really expensive. Very happy with them.

It's a Christmas gift to my son for running

Corro por senderos y el vaso es muy practico para usarlo y guardar

These are very light weight cups that comes in handy. These little cups pack flat and are handy to carry around while out and about. I carry one packed with my water bladder when motorcycle riding and camping. It's a nice option to drink from a cup at camp instead of sucking on a tube. The problem for my use case is that this is a cup that holds less than a cup (in volume). That's enough to quench an immediate thirst, but not enough to sit around and relax without having to get up and refill the thing every 2 minutes.

The cups are good quality, though. They don't smell or taste funny, and pack away very small when not in use. It does seem a little precarious to use because it is so light and thin. It feels like it will collapse on you if you hold it tightly. But they definitely do what they are designed to do, so I'm not going to knock off a star because I use it differently than intended.