You could also feel the beverage were not cool enough.
339933
Very disappointing. really doesn't keep the temperature on what it said (45F). I had a fridge thermometer inside for the whole trip. I had it plugged in in the hotel and when in the car away from sun. The lowest temperature I  got was 50F. You could also feel the beverage were not cool enough.
1174705
It barely chills your canned beverage and it doesn't keep in cold for hours as claimed, even if you put an already cold beverage inside. I would have returned it but I threw away the package.
3427119
I bought 3 of these mugs for my husband and I for Xmas.  First, if you don't like sipping from metal, forget this one.  This mug seemed to feel especially "steely".  The top is awkward and NOT easy to use.  It's scary to tip something hot up and wonder if you'll be scalded.  I never did figure out how to use it.  You need a flashlight and glasses to read the indicators on the top of the cup to figure out what you are doing.  I only wish I had checked customer reviews on Amazon before purchasing them.  I'm here now because I thought I could maybe sell them and save the return postage on returning them to the company.  But after see the reviews and knowing I'm not alone, I just wouldn't feel good about selling these to anyone.  Please, save your money.
466789
.i saw this on vat19 and i thought it would be cool so i got it on amazon for cheaper and then i got it. the drink was chilled not cold or cool like they promised its cool but then when u pour a glass sometimes the drink spills all over the place :( disappointing
4580088
The heat of the drink often make the plastic too flexible and no longer works well as a stirrer. I would recommend a thicker plastic or wood.
1772395
Still sweat a bit and it is weird to drink without using their lid and straw due to thread inside on top. I may need to return.
4094401
Does not work very well to drink directly from the bottle.
4289156
The mixture was difficult to keep liquid in a Blender Bottle, it seperated too soon (before I drank it)...I mixed in almond milk or water.
4122271
This was not a good drink! I drank half of a can. After 30 minutes my hands were shaking out of control and my heart rate was elevated. I felt I had to get up and exercise so I wouldn't feel terrible, not because I had more energy. I didn't feel hungry and I had to pee every few minutes. I can't imagine what would have happened if I drank the whole can. I might as well have taken some crazy illegal substance, because the experience was not good!
3607334
When we saw this, we were excited. Our family loves matcha, coconut and pineapple! We chilled it (as instructed) and shook it (as instructed). But, wow, as we all took a sip, I knew the results weren't going to be great. There was cringing, head shaking, and a simple, "no." Even cold, it does have that viscous feel one associated with coconut water (and learns to accept), but this one had a touch more of that. As though it coats the mouth. The pineapple is subtle, but it's there ... as is a slight matcha taste. As is my experience in general, the coconut water obliterates the gentler flavors. So, if you are hoping for a somewhat harmonious drink, this may not be it.
2560022
It's too buoyant, so you have to weigh it down.  It's not very comfortable.
1726550
When pouring this into the designated soda stream container after putting in the carbonation into the water, the drink fizzes over as if too much is poured in. The mango taste isn't the best and it leaves a orange film like stain on the bottle when you're done drinking.
2677120
I got these for my Dad to go with an additional whiskey glasses purchase. While he wouldn't tell me himself being the sweet Dad he is, I popped a couple of these in my own drink and found them to be subpar.

If you have a small amount of liquid in your drink most to all of the stones may keep it chilled, but a full glass? Not happening. These chilling stones are more for show than anything elsebut hey, that can be fun too.
4663752
My coffee stays very hot after hours, it's too hot to drink directly from it. I had to take Dixie cups or mug to cool my coffee before drinking, just amazing. It's a first world problem.
1498930
I feel like maybe after a few days, we have a defective cup.  Friends and and family told us of how great the products are but the ice is melting quickly.
1259063
It is slow to react. The pre-use temperature is off by 5-20 degrees.
2981633
Product arrived well packaged and on time.  Looked very nice, too.  The beverage did not flow out well.  I removed the spigot and realized that the opening was just not large enough.  Thinking it was defective, I exchanged it for another of the same.  The second had the same issue.  I am convinced that it is not defective; this is how they purposely make them.  It would probably take a full minute to fill a 12z glass.
Other reviews mentioned this but still gave the item 3 and 4 stars.  This is not how beverage dispensers are suppose to work!  Return it!