I keep these in my car for grocery shopping. They are great to put perishable foods in for the drive home. They are insulated, but not designed to keep foods frozen or cold for long periods of time. I would say an hour max. The build quality, price, and fold flat feature are wonderful. I would not put extremely heavy loads in and expect the handles to not fall apart, but this is to be expected for what they are. I recommend these if you live in an area with hot climate like I do.
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