I have three glasses like this and I use them ALL THE TIME.
Right now on Amazon you can grab these Set of 6 Reusable BPA-Free Double-Wall Cold Travel Tumblers, 16-Ounce Capacity, With Straws  for $11.95.
- 16-Ounce Cold Tumbler
- Iced-Coffee Cup Design
- Set of 6 Great for the Office or Family
- Dishwasher Safe
I take these to my voice lessons, the gym and theater rehearsals.
These ship free with super saver shipping or Amazon Prime.