CHILLOUT LIFE 20 oz Stainless Steel Tumbler with Lid - Double Wall Vacuum Insulated Coffee Mug for Hot & Cold Drinks, Leak Proof Lid with Straw, Pink Travel Tumbler - Perfect for Office, Gym, Hiking and Outdoor Activities

This is a great cup! I've had it for about a month now. I tend to drink cold drinks more often than hot ones, and I like my drinks to be on the brink of freezing. (If I am not getting freeze-brain, I'm not satisfied! :) And I dislike watered-down beverages, so something that retains temperatures really well will keep my ice from melting quickly enough to water down my drink. I am able to put ice in this thing and my beverage of choice, go to work, refill it, come back home, and it's still got my original ice in it when I'm ready for bed. Melted somewhat, but there is still ice in there! This is big for me, as I don't like the tap water in my area and do not want to have to replenish my ice while at work using their "tap" cubes. (Note: I do use large (2") ice cubes, which do last longer than smaller cubes, and it's possible this could affect my results.) I even got a nice, cold drink prepared, got about halfway through after a couple hours, then sat it down in a less-than ideal area (ie right next to the heat vent), and dozed off, sleeping for 4 or 5 hours. When I woke, I was mad at myself for leaving it there, sure that it would have melted my ice by now as the heater was running pretty much constantly. The cup was warm to the touch on the outside, thanks to the heat blowing directly on it. But guess what! Still plenty of ice and a cold beverage inside the cup!Since I am not much of a hot drink person, I have so far only used it once for that. But it retained heat pretty well for that, too. I drank it slowly on purpose to kind of see if it holds it for the 6 hours advertised. Now, when I do have hot beverages, I do not like them scalding hot, so I started with my temperature lower than most "hot-drink people" probably do. But it stayed warm for the entire 6 hours, though after 5 hours it was noticeably cooled down a little more - but not to the point that it ruined the beverage. I suspect had I began with a warmer temperature to start with, it would have performed even better.As for other aspects of the cup, the "grippy" texture on the cup is nice, helps to keep it from sliding out of your hand. The outside of the cup stays at room temperature regardless of the temperature on the inside of the cup. The lid appears to be sturdy, as I have already managed to drop it from chest-height onto a tile floor (which was a death-sentence for a previous cups' lid), and this lid was not damaged in any way. No chips, no cracks, no noticeable differences. There is a slider tab on the lid so you can close off the drinking slot. While this does not make the lid spill-proof, it does lessen how much splashes out, and thanks to the design of the lid, what does splash out will likely stay on the lid and drip back into the cup. (I have not yet splashed anything beyond the lid except for when I accidentally tilted it pretty far.) If you do knock it over, the lid does at least slow down the amount of liquid that would otherwise escape.I will note that when I first purchased this cup, the original lid that came with it did not seal very well. It was much looser than the lid for my other (smaller) cup, and if I sipped out of it without a straw, it dripped from the seam between the lid and the cup. I contacted the seller with my concerns, and they very quickly sent out a replacement lid with no hassle. The replacement looks slightly different (the sliding cover is opaque rather than clear), which made me wonder if perhaps they had a run where the lids didn't come out quite right. Regardless, the replacement lid has a much better seal, and the leaking issue was solved with that.Bottom line, great cup at a nice price with hassle-free customer service. Highly recommended!