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.

Works exactly as described. Fits perfectly. Ice lasts a full 2 days before fully melted. Love it!

Removing the ice is cumbersome. After reading other reviews, will try some warm water on the bottom before removing. Otherwise, it's a decent product and works well in my Stanley cup.

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.

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.

Fits great. However, getting the ice out is a pain. Hard to get out and by the time you do, your hands are hurting from the coldness. Also, it takes more than a day for it to freeze fully.

Our ice maker died in the fridge and there was no way I could go without ice for my Stanley Tumbler and all the pretend water I drink during the day. First world problems- right?!?! Ok- so I am more a coffee by day, wake up a million times in the night, to get a sip of water person- but I like it to be cold. And I also need cold ice water to last when I stay up late to read ACOTAR. The ice machine dying was an excuse for me to overnight ship this and try it out. Like others have said- the lid is hard to fit and useless, unless you decide to use the container separately from the silicone mold. But…it is a silicone mold, so ya kinda need the base container. Don’t totally fill or over fill the three levels. 1 goes at the bottom (I thought they would nest inside themselves and tried to put 3 in first) but my much smarter teen showed me otherwise. Duh on my part. Ok- so a bit tricky to pull out, but not hard- did I just say that- this applies to ice molds only! Put some elbow grease into rolling and pulling the silicone mold back off the level you are working on. Then squeeze together the center numbered part and push it down as you pull from the bottom and then you should be able to pull up on the ice ring, to get if off (oof- not sure how else to explain that…can you tell I am reading ACOTAR?). Yes- your fingers are going to freeze. Take breaks in between layers if needed- don’t get frost bite- not fun and makes it hard to fly. BUT…it is worth it, they stack great in the 40oz and stay cold for over 24 hrs. And it looks cool when you drop them in. Just be cautious, level 1, when it clinks into the bottom, can be loud. My dogs think it warrants barking, but they are silly. All in all- highly recommend if you want fun, satisfy, long lasting, ice rings for your tumbler. If you know someone that loves their Stanley- it would be a great gift!

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.