Silicone Food Covers

Published November 1, 2013. From Cook's Illustrated.

Overview:

Flexible silicone covers are designed to help replace plastic wrap by turning any bowl into an airtight, leakproof container for storing and microwaving foods. Some lids stretch tightly over the bowl; others are flat and rest on the bowl’s rim, forming a suction seal when you tug gently on the tab or knob on top. Costing $14.95 to nearly $40, the covers sell singly or in sets of three to four sizes. Most were leakproof. When we sealed bowls of soup with the lids and tipped them over, the stretch-to-fit lids went upside down without dripping—just try that with clear plastic wrap. We could tip most of the flat lids past 90 degrees and they stayed sealed; one brand dribbled. To test the models’ claims of being airtight, we loaded bowls with Drierite moisture-reacting crystals and covered them with lids. Only the flat lids kept the crystals dry for three days. We found another advantage to flat lids: They stayed put during microwaving, preventing splatters, while stretchable lids inflated from the expanding, warming air and popped… read more

Flexible silicone covers are designed to help replace plastic wrap by turning any bowl into an airtight, leakproof container for storing and microwaving foods. Some lids stretch tightly over the bowl; others are flat and rest on the bowl’s rim, forming a suction seal when you tug gently on the tab or knob on top. Costing $14.95 to nearly $40, the covers sell singly or in sets of three to four sizes. Most were leakproof. When we sealed bowls of soup with the lids and tipped them over, the stretch-to-fit lids went upside down without dripping—just try that with clear plastic wrap. We could tip most of the flat lids past 90 degrees and they stayed sealed; one brand dribbled. To test the models’ claims of being airtight, we loaded bowls with Drierite moisture-reacting crystals and covered them with lids. Only the flat lids kept the crystals dry for three days. We found another advantage to flat lids: They stayed put during microwaving, preventing splatters, while stretchable lids inflated from the expanding, warming air and popped off, making a mess. Our favorite was a set of three, which stuck firmly, keeping contents under a moistureproof, airtight seal.

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