Rubbermaid Lunchblox Kids

The Rubbermaid LunchBlox solves the ice pack integration problem at the lowest price in this lineup: a flat blue ice pack snaps into the bottom of the carrier and keeps the container stacked above it, eliminating the separate ice pack rattling around an insulated bag. The modular containers snap together so the configuration changes based on what you're packing that day. At $18, it is the cheapest pick here and it shows in the plastic quality — the lids don't seal as impressively as Yumbox and the containers scratch more easily. But the snap-in ice pack is a genuinely useful feature that more expensive boxes don't offer, and it keeps food at safe temperatures without a dedicated insulated bag.