Costco’s $25 Souper Cubes Dupe Is Flying off Shelves at Half the Price

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Can you bake directly in the Costco silicone freezer trays?
Yes. The silicone bases are oven-safe up to 400°F (204°C), making them suitable for baking individual meatloaves, small breads, or frittatas. However, you must remove the clear plastic lids before putting the trays in the oven, as the lids will melt.

How do you remove stubborn food odors and stains from the silicone?
Soak the trays in a mixture of warm water and white vinegar, or apply a paste of baking soda and water to the discolored compartments for several hours before washing. Running them through an oven cycle at 250°F (121°C) for 20 minutes can also bake out trapped volatile food aromas.

Are the Costco freezer trays permanently available in warehouses?
Costco operates on a rotation model. Kitchen storage items frequently appear as seasonal buys during autumn and winter, then disappear when spring gardening and outdoor patio gear takes over floor space. Stock fluctuates by region, making early purchase advisable when pallets arrive.

Do food blocks stick to the bottom when freezing liquids?
No. Silicone maintains flexibility at sub-zero temperatures. Allowing the tray to rest on the counter for two minutes after pulling it from the freezer breaks surface frost, letting you pop the cubes free by pressing upward against the flexible bottom.