Ziploc Twist ’n Loc, $3 for two 2-cup containers

Problem: Homemade soup hasn’t a chance of surviving till lunch when a lid leaks or — horrors! — comes off entirely in transit.
Solution: This disposable’s top screws closed, locking securely. In testing, it was repeatedly knocked off a kitchen counter onto a hard floor and landed intact each time. Also available in a 4-cup size.
To Buy: At supermarkets.