Ice Cube Tray for Tumbler Cup 30Oz-40Oz, 3 Pcs Silicone Cylinder Ice Mold with Lid and Bin for Freezer, Easy Fill and Release Ice Maker for Whiskey, Cocktail BPA-Free

I saw someone using this at work and had no idea this was even a thing. Ordered for my daughters to use in their Stanley’s. Ice quality is fantastic, thick and keeps beverages cool all day and fits in the mug nicely. Quality well-made material Easy to clean. Wish I’d known about this sooner.

I bought one and then I bought another. These are great and yes the ice last a long time even in hot weather. My drink was still cold. I would definitely buy these again and recommend them to everyone I know. Thank you.

Overall, I like this product. It has a couple of downsides, but does the job it was meant to do.Pros: It works well. The ice "cubes" It makes are thick enough that the water in my Yeti tumbler stays cold for hours even when left closed up in a hot car. I can't say for sure that it would stay cold all day in that situation, as I haven't had occasion to leave it in the car all day, but my water certainly has stayed icy cold when left in the car for 3 to 4 hours in the direct sun.Though It took me a couple of uses to figure out the best way to remove the cylinders from the mold, it is quite easy now.1 Peel down the outer part of the mold2 Grab the inner "core" , top and bottom, and squeeze it towards its center, which peels it loose from the inner edge of the circle of ice.3 Grab hold of the cylinder of ice and slide it right off.The first use, I did notice that my water had a slight flavor of the silicone, even though I had washed the mold before using. However, that disappeared very quickly, So it doesn't seem to be a problem.The hard plastic container that holds the mold while freezing is a very important item, and I'm very glad it was included. I have lots of other things in my freezer and can't always make room for the ice cube tray to sit directly on a shelf where it can be perfectly flat, so having that support is great.Cons:On the first use, there was a slight but noticeable flavor of silicone in my water, as stated above, but It dissipated by the second use, so it was only a temporary problem.While the hard plastic container is extremely helpful, the lid refuses to snap on. Even setting it on the counter, getting one end In place and pressed down, when I try to get the other end of the lid to snap into place, it simply won't. Even holding one end down tight and trying to press the other end into place doesn't work. The lid simply will not go on. It is possible that this is just a random defect with mine, but it is there nonetheless.And finally, although this is not a con but just something to be aware of, do not fill the molds all the way to the top. Water expands when it freezes, as we all know, and when I filled the molds to almost full, I couldn't fit the lid on my tumbler with the ice inside. The first time I used these, I had to run the top one under hot water and melt off a good quarter of an inch of its height. Now, I leave a little more than a quarter of an inch of headspace in each mold when I put water in, and that works just fine.

I have the simple modern 40 oz tumbler and this fits perfectly! It’s a little tough to get the ice out of the mold. So, pay attention when filling the trays. But WOW! My water is so cold! I love it.

Works well and makes three sizes of ice cubes. I use them in my Stanley 30 oz and 40 oz cups. They're easy to use and you can stuff fruit in the mold and freeze it with the cube to make "pretty ice". They last quite a while in the cup, too, so you don't need a lot of ice which can water down your drinks.

The lid does not close properly and the plastic container has cracked. The silicone mold works and makes the perfect size ice cubes for my 2 sizes of Stanley tumblers. The color is okay not my first choice however it’s just an ice cube maker.

My wife uses these daily. I really only feel the two smaller sizes because the third one just adds too much ice as far as I'm concerned. If you have a Stanley type of a cup then these will last for hours as well

Great product! If you own a 20, 30 or 40 oz tumbler you need these!! No more stabbing the ice cubes that freeze together in your tumbler, just pop out the ice ring, slide it into the cup and go! Best of all you can stack 2 on top of each other to keep your drink extra icy😱