Review on 3 Pack Contigo Fit Shake & Go 2.0 Shaker Bottles With Chug Cap, 20Oz In Earl Grey, Blue Poppy & Salt by Claudia Phipps

These cups seal well! So much so that I used them on a recent trip to Vegas to carry distilled water for hubby's CPAP. The little clip makes them convenient to put on the outside of a backpack, saving inside room for other things. The blender ball, well those have their own problems---You have to be Schwarzenegger to shake them hard enough to really blend IMO, but otherwise, this is a great product at a great price!