JCPenney offers this Lock & Lock 20-Piece Round Storage Set for $15. Apply coupon code "JCPSHIP" and choose ship-to-store pickup to avoid the $8 shipping charge. That's $6 under our November mention of a similar 16-piece set and the lowest total shipped price we could find by $37. Sales tax is added where applicable. These containers come in a range of sizes and feature locks on all four sides for even air pressure and an airtight seal. They are microwave-, dishwasher- and freezer-safe.