40-Ounce Wide Mouth with Flex Straw Cap

[This review was collected as part of a promotion.] I have wanted to order one of these ever since the 32oz version was released, especially hoping for a 40oz size. When the new size became available, I also hoped it would come in a couple of colors similar to those of the 32oz model, but that never happened. Instead of waiting for these colors, I finally ordered it because I was tired of my 40oz travel tumbler always spilling out. I am very happy with its leak-proof feature; however, I find the tumbler a bit too heavy when full, and it tends to knock over easily. Aside from these issues, I have no other complaints and am very satisfied with it.