I was excited to use this, but I have access to a fridge at work, so I actually have less need for the thermal qualities than I had planned for. My wife discovered that the lid can sometimes be a little difficult for her to open and close, but I don’t really have the issue, maybe because I have bigger hands. This might also be more of an issue with the larger 21.5oz model than it is with the smaller one because of the hand size dilemma.
Overall, the S’well Eats container is really nice quality and when I do need it, it does a superb job! I can make a smoothie in the morning and it is the exact same frozen texture/consistency at lunch as when it comes out of the blender. I’d highly recommend.