Costco Souper Cubes Tested: Side-by-Side Comparison of the Viral Freezer Trays
A kitchen system only works if cleanup is effortless. Dishwasher safe freezer trays must survive repeated high-temperature sanitizing cycles without warping or clouding.
We cycled both units through ten consecutive heavy-duty dishwasher cycles at 145°F wash temperatures and high-heat drying coils. The original trays emerged with zero distortion. The lids, which must be washed on the top rack, maintained flat seating margins without bowing.
Extracting food from the trays showed a distinct mechanical difference. Pure food-grade silicone remains supple at -10°F (-23°C). To release a 1-cup portion cube, press both thumbs into the bottom of the individual cell. The frozen block glides upward instantly. Lower-grade synthetic silicone stiffens significantly at sub-zero temperatures, demanding substantial hand strength or warm water applied to the exterior base to release the frozen mass.
