Ice Cube Tray for Stanley Cup, Silicone Ice Mold with Lid for Tumbler Mug 20-30-40Oz, Large Hollow Cylinder Ice Cube Mold for for Freezer, Drink, Juice, Whiskey, Cocktail, Coffee, BPA Free (Green)

These fit very well in my Stanley tumblers. There are three sizes and I have used two of the three sizes as I only have two sizes of the Stanley tumblers. I like that these are individual instead of all three sizes being in one tray. It’s better to have them individually because they are easier to fit in my freezer and it takes less space (plus I may just need one or two of the molds so why would I want to put all in the freezer if I don’t need them). It was easy to get the ice of the mold and into the Stanley tumbler. This is a great gift for those Stanley lovers. I can only speak for the Stanley tumblers as I don’t own any other type of tumblers. I think these will probably suit other tumblers too. Love these.

I got these because there are three separate molds. I'm able to use them on two different size cups. It takes a little power to get the ice out of the molds but after a few uses it comes easier.

My daughter loves her Stanley. She was excited to get this as a gift. Her friends say they work great.

They got perfectly in my Stanley. This is awesome because the straw still straight