Amazon offers Prime members the Rubbermaid 42-Piece Easy-Find Lid Food Storage Set, model no. 1880801, for $15.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $8.65.) That's the lowest total price we could find by $3, although we saw it for $1 less last December. This microwave-, freezer-, and dishwasher-safe set includes five 1/2-cup containers, five 1-1/4-cup containers, five 2-cup containers, two 3-cup containers, two 5-cup containers, two 7-cup containers, and 21 easy-find lids.