SIP

I bought one of these for my birthday to help a lot and to keep track of how much liquid you drink. You get 2 straws, the lid can be opened. I accidentally spilled a little water while I was in the car. A bit smoother technology.

Excellent size, could also sell a bit of personal accessories for these too 👍

I am very happy with my pink tumbler with crystals. It keeps the drink cold for a long time! But, I have the same problems that most others here are writing about.. the crystals shift and fall off, even though I have only washed mine by hand. And now, the plastic pins that hold the rotating part on the lid are broken, when I washed the lid. I am very sad about this and disappointed that they don't hold better. In practice, this part of the lid is useless now.