Souper Cubes Silicone Freezing Trays

Souper Cubes are made from platinum-cured silicone, which is the highest quality grade of food-safe silicone available. Platinum-cured silicone uses a platinum catalyst in its manufacturing process, resulting in a more stable, fully cured material compared to peroxide-cured silicone. It does not leach detectable chemicals into food, withstands temperatures from below freezing to above boiling, and is dishwasher safe through thousands of wash cycles.

The practical use case — portioning and freezing soups, stocks, broth, sauces, and cooked grains — is one of the best applications for food-grade silicone. Once frozen, the flexible silicone mold pops out the cubes easily, and the portions can be stored in glass containers or silicone bags for longer-term freezer storage. This workflow reduces food waste and enables efficient batch cooking.

The BPA-free polypropylene lid included with Souper Cubes is used during freezing to keep the surface of the liquid flat and to allow stacking. The lid is not used for long-term storage or heating, so contact with the polypropylene is limited. If you want to minimize all plastic contact, transfer the frozen cubes to glass or stainless storage containers after unmolding.

When purchasing silicone food storage products generally, confirm they are described as platinum-cured and food-grade. Cheap silicone products that do not specify the curing method may have residual compounds or release odors when heated. The Souper Cubes brand has a strong reputation for quality control.