Familife 304 stainless steel fresh-keeping box food grade wholesale single and double-layer student lunch box microwave oven picnic insulated lunch box 2022 NEW

【KEEP FOOD WARM DESIGN】- It can be used for hot food such as soup, fried rice, etc which will keep warm for 1-2 hours or cold food [with the insulated lunch bag can keep for 2-3 hours] such as salad, pasta, fruit, etc. Please note for hot food, fill at least 3/4 of the container to acheive good insulation capacity. This will maintain temperature longer than lunch boxes with no insulation but does not provide thermoses-like warming