I have a lot of these style tumblers. My favorite thing about this specific tumbler, is the interior has NO seams. On all my others that have seams, they can get nasty stuff in those seams. It just has a higher probability of issues. I've dented some of the interiors just by adding ice from my fridge ice maker. This one has been solid so far. It's got no dents on the inside from ice. I haven't really beaten the thing up yet though so I don't know how well the exterior will hold up. There are two seams on the exterior which I personally don't mind. The lid is interesting. I've never seen one like it. It's got a large lip on the section you drink out of and a slider to open or close the drinkin' hole. It's not sealed up so much that you can just toss it in a bag and expect it not to leak. but it's nice to be able to close it and keep bugs out of whatever you're drinking. The lid actually screws on, so there's no silicone/rubber seal, which I like because for me, that's very hard to keep properly clean. Product is designed in the USA, but actually made in China. I actually thought all pelican products were made in the USA but I guess I was thinking of some other brand. I've only kept cold drinks in this, but it keeps ice pretty well. I put ice and water in it one night and then forgot about it. When I came back to it late the next day it still had a good amount of ice in it and the water was nice and cold still obviously. Now I just dump cold water into it and by the time I'm finished with it, the water is still cold so I've got no complaints. I got the silver one, and it says it's not recommended to put in the dishwasher, do not freeze and do not microwave. I always hand wash these things anyway so that's not a big deal for me. The base is tapered, and it's taller than most tumblers in this size, but I think that's just so it fits well into more cup holders. Quick recap:No internal seamsFunctional lid that has a slider to open/closeKeeps cold stuff cold for a good amount of timeFits into cup holders pretty well