Amazon offers Prime members the Rubbermaid Easy Find Lid 18-Piece Food-Storage Container Set with Lids, model no. FG7K3900CHILI, for $7.99 with free shipping. (Non-members can spend over $35 for free shipping; otherwise, shipping adds $7.18.) That's $2 under our mention from last May and the lowest total price we could find by $5. It features lids that snap together and to the base bottoms.