lunch holder

Common cooling and insulation features include fully insulated liners and multi-layer thermal insulation, heat-sealed PEVA linings, and removable or built-in ice packs that freeze overnight to help keep food cool.

Common accessories include built-in or reusable utensils (forks/spoons), removable freezer packs or ice packs, divided trays for portioning, and storage lids for extra containers.

Closures include zippers on soft bags, latches on plastic containers, and locking clips or airtight lids with rubberized sealing rings designed to improve leak resistance.

Capacities range from small meal containers around 3.33–3.7 cups (about 22.8 ounces) to larger options such as a 54-ounce salad bowl and 9-quart insulated bags; a 2.8-quart container is also commonly listed.