Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Do they stack?
Document: They work as advertised, easy to stack and makes good sized cubes.
Very easy to use. Stack nicely.You can fill these to the top and cubes come out will little effort.
These work great! The ice pops right out and they do stack very well. I like that you can buy them in pairs.
Works great. Easy to use, sturdy, and ice comes out nicely. Can stack the trays, too. We liked that it was BPA-free.
The ice comes out easily and they stack nicely. I think you can get them cheaper at Walmart though. They do the job though.
These things aren't cheap, but worth it! Ice breaks from it easily, and they stack on top of eachother without freezing together. Highly recommend!
Easy to fill and stack in the freezer. Easy to pop out when ready. These are so much better than the silicone ones which hurt the fingers when removing.
excellent ice cube trays. stack holding water without the pods dropping into the tray below. cubes come out beyond easily.
Making ice is less annoying now because the ice cubes slide right out of these trays. Also, the ice cubes are big. They stack well too.
Ice releases with little effort and they stack very solidly. Would buy more but really wish it wasn't as expensive as it is. Assuming they last a long time it will be worth it.
Answer: Yes