Amazon tumbler vs Stanley tumbler side by side. Both hold 40oz (really 20 with ice) and keep ice cold the same. I alternate the two but reach for my amazon one more bc it doesn’t leak as bad. It will eventually come out of the straw if it’s full or turned upside down but the Stanley leaks immediately so I feel like I’m constantly cleaning up spills with the kids LTKhome LTKfindsunder50 LTKxPrime