Tupperware Rock ’n Serve, $32.50 for a set of three (1 3/4, 2 1/2, and 3 1/2 cups)

Problem: The container cracked in the microwave when you tried to heat the lasagna straight out of the freezer.
Solution: This sturdy worker’s pop-up steam vent prevents microwave detonations. Rounded feet stave off freezer-floor damage.
To Buy: www.tupperware.com.