ContigoStreeterville 40oz Tumbler Stainless Steel Vacuum Insulated Leak-Proof Cold for 29 Hours Indigo

If you want to use this thing with the straw, you might want to start with some other reviews. For, while my review will be comprehensive, I use it to hold and drink coffee without the straw, which is kind of the whole reason I bought it. You do NOT have to use the straw. There are two flip caps to keep it sealed with or without a straw. I use it like a mug. I don't even know where the straw is anymore.Alright, first up this thing looks A LOT like a Stanley mug because it is a lot like a Stanley mug. Same size and shape. Same metal inside, vacuum seal outside. I think the lid is different. I bring this up because if you are like me and you don't necessarily keep up on trends, you may have missed that Stanley mugs like this were super popular (and still are super popular). In fact, they were so popular that now it is popular to make fun of the, as befalls all trends that are big enough for long enough. I'm only saying this because after you get this mug that you think you discovered, you may be mocked by younger folk, particularly your children... if you care about that sort of thing. And, I oop. (Don't worry that's an even older thing where apparently we made fun of people--particularly girls--for having HydroFlasks.)Now, that you are hip and with it (don't start), I will review the actual Contigo 40oz, bring it on, mug.OK, to start, this thing is big. Probably too big if I'm being perfectly honest. At this size, you've sort of crossed the line between mug and thermos. On the other hand, this is a mug that holds about as much as a thermos, so... I've decided I like it, but I did have to get there. I bought this because it was bigger than what I had. (Turns out what I was using only held 16oz, so double it is only 32oz and maybe I overreached.) It was also the biggest I could find with a completely closable lid. Most of these type mugs come with that stupid "leak resistant" or "splash proof" lid which means it leaks unless you keep it upright at all times. I wanted one that sealed all the way up so I could put it in a backpack or set down on the seat next to me without worrying about it staying up. The reality is that while this mug does fully close, I would NOT trust it inside a backpack. I'd be a little bit worried about it laying on its side on something I really cared about.It's not that it leaks, its just that the TWO different closers could be popped open with enough lift/torque. One flip open cap is the main one that you would drink out of if you were drinking from it like a mug. There is a 2nd cap that covers the straw hole if you aren't using the straw. It's a one on the other kind of thing so you can open the straw cover by itself but opening the drink cover opens both of the lid together. It does not leak. This is important. It is a good sealing, no leak mug. The only weakness, if you want to call it that is that there is no way to latch down, or lock the covers. So while it does not leak the cap could get flipped up in the right circumstances.Insulation: I'm not really usually about 4 hours hot / 12 hours cold kind of measures because it doesn't take me that long to drink 40oz. That being said, I did fill it with coffee (hot), drive 40 minutes to a doctor appointment, and then go into the doctor appointment having not finished the hot coffee inside. When I came back to the car almost 60 minutes later, the coffee inside was still hot. Just a bit cooler than when I left it. If you're doing the math, I stayed good coffee drinking temperature for at least 100 minutes. It was in the 30s outside when I left it in the car, so it held up to some cold. A different time I left it on my desk in the office (normal inside temperature) and found it still drinkable four hours later, so I'm going to say that it keeps hot liquids hot for a minimum of 3 hours, and maybe more.If you're wondering, this holds about a half a pot of coffee. Oh, what's that? It doesn't say you can use it with hot? The other reviews say stuff about not using hot? Pshaw! The reason is that after a certain size, manufacturers don't like using certain kind of lids (the ones that seal) with hot beverages because the hot liquid inside that stays hot can end up building up some pressure, and if you open it some place not so hot, that pressure can cause the hot liquid to burst out of the mug. The reality is that if you fill this mug with hot liquid, and let the pressure build up, when you flip the cover open, it might spurt you with a little bit of hot spray. Of course, you can keep this from being an issue by pointing it away from your face when opening in, or by flipping the little straw hole cap open first. Either way, it probably won't be a big deal. I put hot coffee in this every day and it hasn't burned me yet.Another thing that is really cool about this mug. The inside is made of stainless steel. I have tons of stuff that is stainless steel and it always says something like it doesn't retain flavors or take on flavors or whtaever. I never really notice because I wash stuff after I use it, but in this case it's awesome. You can put coffee in this thing, leave if for hours, then just rinse it out and drink water out of it with no coffee taste! So cool. The one caveat is that the lid is plastic and you can't say the same for it. So, you'll have to put some effort into washing the lid, or just put up with a bit of coffee taste, or do what I do and leave the lid off when you are drinking water. Note, there is nothing wrong with the lid, it's the same as anything else plastic.Super double bonus points: I put it in the dishwasher. No hand wash only BS. Thing goes in and out of the dishwasher works just fine.Bottom line: If you find this and you want a usable mug that keeps your stuff at temperature this is a good one. I'd get it on sale for max value. Now, if you want the "real brand name one" that is would be a Stanley. They aren't as popular anymore, and they go on sale a lot too, so you can comparison shop.

Huge and holds my ice tea cold for hours!! And there is no condensation. Exactly what I wanted. Love it!!!

I’ve been using this bottle daily for a few weeks now and I’m seriously impressed! The design is sleek and modern, making it easy to carry around whether I’m at work, the gym, or just running errands. The lid seals tightly, so I haven’t had any leaks in my bag a major win!

Heavier in weight but quite durable and surprisingly comfortable to hold onto. The lid threads on nicely. Another winner from Contigo!

Much larger than anticipated. After a week of use, it sounds like there are beads of something loose in the shell of the tumbler. Keeps iced coffee cold. Just too big for me.

Love the size and very durable.

Mine didn’t come with a straw!!

I own a few Stanley mugs they are great, but this one was half the price, and keeps the drinks cold with ice just as well if not longer than my Stanleys!! Great buy!