I love this cup! I've put ice water in it for my son and left it in a hot car and ice will still be there after hours. I've put this in the fridge overnight with ice in it and it still had ice cubes in it the next day. Yeah, it's expensive, but it works just as good as the really expensive yeti cups. This is perfect for toddlers and kids on the go or at home. Especially if you kid is a big milk drinker, you don't have to worry about it getting warm if he sips on it for hours. I plan on getting my son another one of these so that we have two in the rotation!

My son loves the design!! He is obsessed with Blaze and the Monster Machines! As far everyone who wrote something about the text "chipping" off, I don't understand how people don't see that this is clearly how it is designed to look. It seems pretty obvious to me and is shown that way in the photo before you order it. I work in the printing industry and I feel that the printing is of good quality. I put this cup in the dishwasher and haven't had any issues with the design rubbing off. I also have had no issues with the cup leaking. You need to make sure that the silicone straw is pushed up all the way and completely flush with the inside of the lid and you should have no issues.

It keeps water cold all day and doesn't leak...what more can I say?! When I first got these I filled them up and tested for leaking. When the lid was closed and I laid it on its side there was water in the top when I opened it. I was bummed. Looked like the water was leaking out of the vent for the straw. Then I noticed a little knobby thing (yup that's the technical term) on the lid that clearly was supposed to plug that hole when the lid closed. After checking it out more I realized when i put the straw in, the part you sip on, I didn't get it all the way up. So you push it in from the underside, but after you do that, grab the part you sip on and give it a tug. It will come up through the lid just a little bit more. Then I closed the lid and it hasn't leaked since.

I think anyone else with reviews saying it leaks probably hasn't figured this out. And whoever uploaded the video of it leaking, aka pouring out of the straw when the lid isn't closed...ah duh lady. Straws don't seal themselves. Of course tipping it upside down will make the water pour out. Come on.

It comes in a ton of different options and my kids love them! Also, they're not that heavy. Some people make it seem like their kid cant lift these, my 2 yr old daughter carries hers all day wherever she goes.

We have this to my son at 14 months to use as a travel cup. He took right to the straw and even though he had to push very hard (for his small finger strength) loved opening and closing the thermos.
It is, however 1) not leak proof when open (do NOT leave it with your toddler in the backseat of your car!) and 2) not leak proof when closed UNLESS you really pull hard on the top of the straw to make sure the rubber part is all the way in the cap, then run your fingernail around the edge of the rubber to make sure it is tucked under the thread. We had a lot of spills in the diaper bag before I figured this out. Of course, getting it in there so tightly means that it is difficult to get back out.
All in all, we got what we needed, but it'd love to see an easier way to at least get the rubber top out without needing to push, pull, wiggle, and cajole.
Oh, and for parents wondering about it, we have put warm (not hot) milk in there with no problem. Our temperature limit was more based off of our toddler's ability to drink warm liquids from a straw versus a cup. Your mouth is more sensitive with a straw. Don't believe me? Try sipping hot coffee, then try sucking a big mouthful up a straw because you don't know any other way to use a straw but to go all in!

This bottle is awesome! We've tried a LOT of different bottles for our 2.5 year old son over the past year+.

- Camelback: Wore through nipples from him chewing on it and splitting the edges of the spout, cracked two insulated bottles in a matter of weeks, one with a relatively minor drop from about two feet up onto tile. Not impressed, we simply stopped using them as they gradually fell out of favor in our house. Not to mention the plastic material. Mildly acceptable if the bottle is truly top notch functional over other options with better materials (glass, metal). Not the case here.

- Green Sprouts: Had two of the glass bottles with plastic outer protective sleeve. The outer sleeve was really solid, flexible, durable plastic. Well designed bottle, good nipple. But, lots of parts, so relatively more of a pain to clean. The big issue was that eventually, both glass inner bottles shattered (n the kitchen, no less - fun), and when they did, the mess and concern of lost glass shards to be found by a child's curious fingers later was enough to not purchase more. It's as simple as turning around for a second while the lid is off but assembled in the plastic outer casing. Kid picks it up, drops it on the ground, the exposed edge of the glass hits the ground first and you have a huge mess on your hands. The upside of these bottles didn't exceed the downsides.

Nuk bottles: We used these for a while, but the nipples wore out so much (split holes), we were ordering replacement nipples on the regular. Our son liked them, but again, the upsides didn't exceed the downsides (rapidly worn nipples, plastic material).

Thermos Funtainer: We got one of these when our son was 1 year old as a gift. We loved it, but the button was too stiff for him to open at that age, so we shelved it for a while, breaking it out occasionally to see if he liked it. I loved the R2D2 design on it, and preferred the metal/silicone materials. I also liked the plastic base to protect from dents. While we waited to see if this bottle would eventually become the go-to bottle, we tried other options (listed above). They all failed for one reason or another, leaving me wanting better options.

Eventually, my son's strength and dexterity improved to the point of being able to open the lid easily, so the Thermos came back into play. After researching other options (Pura, Camelbak metal, etc), I noticed that aside from the Bottle Rocket, none of the manufacturers seem to protect the base of the metal bottles, leaving them prone to denting, which makes them wobbly when placed on a flat surface. Pet peeve, I guess. Anyway, we decided to give the Thermos a shot at daycare, which is the perfect product test scenario. If a bottle can survive daycare, it wins. Camelbak failed the daycare test. Twice. Not only is the Thermos thriving amongst all the other bottles at daycare, but I've noticed that other parents agree. It's the only bottle in the bunch that is there in multiples. All others are single representations of a bottle brand. The teachers like them too because they're tough. And with all the bottles together in a basket or cooler, exposed nipples is not that cool. These kids are germ breeders extraordinaire, and the Thermos cap protects the nipple from the outside grime and germs of other bottles.

PROS:
- Cap protects the nipple from germs and general dirtiness.
- Plastic base protects from dents, so it stands up stable, no wobbliness.
- Huge range of graphics and lid colors means it's easy to spot which is yours when there are several of the same bottle together, which is the case with the Thermos, everywhere I go with other parents and kids around, when bottles are around, I always seem to notice lots of the Thermos brand. No confusion of who has which bottle is nice. Not everyone labels a bottle, and kids can't necessarily read their names yet. MY kid knows which is his by the graphic, and the other Thermos bottles are clearly different.
- The part that seals the bottle lid is silicone rubber, and it's one-piece with the nipple. So other than the straw there is no plastic in contact with the liquid (the straw doesn't need to be used if you're concerned about plastics), and it's super easy to clean.
- It's metal (win) and the insulation is really good. Stays cold longer than the Camelbak insulated bottle.
- Price is about the same as a plastic bottle, but way more durable and safer for fluids.

CONS:
- Minor quibble, but the nipple IS free-flowing, so if the top is open and the bottle is tipped over, it will leak. But for me it's a non-issue, since my kid loves to close the lid. He learned early on to close it as a habit. Good practice to prevent leaks, keep the nipple clean, and a side bonus is the lid is probably more vulnerable to breaking off if it's open. When closed, it's tough.

Of all the metal, glass and plastic bottles on the market, this one wins my business so far. No other bottle checks all the boxes like this one, and the parents around me seem to agree. My kid loves it, especially his new one with the train on it. The designs are fun and plentiful.

Over the past two years I have fallen in love with this cup! The blue Thermos Funtainer cup (see image) was purchased 2 years ago for our then "“ kindergartner and has now been used daily through two years of school. Although a little scratched on the outside, it still works perfectly. A year and a half ago we added the pink one for our daughter to travel with, and she now uses it at home daily. The purple and teal cups were added half a year ago for our other two daughters, who also use them daily. The lime green one was just purchased and will be used for our newest addition when he is old enough.

I only wish they sold these in more solid colors!!!

These cups are great for every day use. We use them at home in order to cut down on the number of plastic cups sitting on the counter. With there being so many design options, it is easy for each child to know which cup is theirs.
A little tip: I have read one review that talked about mildew under the lid. I have never had a problem with that even after one was lost for about a month, with water still in it. We do wash the cups almost daily. Removing the rubber straw insert when washing and letting it dry completely has no doubt helped these cups to stay mildew free. The rubber straw insert can be a little bit stubborn to remove. I've learned that if you leave the plastic straw in the rubber part and, with a wet washcloth in hand, grip where the two straws meet and pull, it makes the rubber insert much easier to remove. Just a little tip.
If you were considering a new cup for your child, I could not give any higher of a recommendation. Maybe I'm a little obsessed, but I LOVE THESE CUPS!