Prepworks from Progressive LKS-07 Fresh Fruit and Vegetable Keeper, Pack of 4 The special design lets you wash and store all in one since the container doubles as a colander The water reservoir in the base keeps produce moist and the adjustable venting regulates air circulation and moisture The oblong shape works for all lettuce types and there is an extra divider for simultaneous storage of different types of produce and stores under the lid when not in use