Ice Cube Trays Rectangular x 3 Square x 4 Material: Plastic Thank you for viewing. I used these to store baby food. Ice cube trays were convenient for freezing food in small portions. After freezing, I stored the cubes in Ziploc bags, which was very helpful. They can also be used for making ice for lunches or for narrow-mouthed water bottles. There are no major stains or scratches, so I think they can still be used. If you have any questions, please feel free to ask in the comments section.