You can find cardboard boxes at most stores that sell mailing supplies. If you’d like to save on shipping costs, visit your local post office to see if you can use any specially priced boxes.

Some companies sell insulated shipping boxes, which come with both a cardboard box and a styrofoam carton. Instead of styrofoam, you may use some kind of recyclable foam material, but it still needs to be at least one inch thick.

Any plastic bag works well for this. If you’re shipping something extra fresh, like seafood, consider placing absorbent pads along the bottom of your container. This can protect your box from turning soggy.

You can find liner bags online, or at a store selling mailing supplies.

You can purchase cold packs from any specialty store selling mailing supplies. Plan your ice amount and packaging according to the expected delivery time, adding one extra day. For example, if the shipping company tells you they would deliver it within one day, plan for two days.

For instance, it’s better to mail an apple pie than a lemon meringue pie.

Keep in mind that your package may tumble around during the shipping, and the only thing you can do is to pack it as well as possible.

Reusable plastic containers can work for this, or a box or tin.

Frozen or refrigerated food needs to stay under 40 °F (4 °C). If it thaws out too much, it’ll start to spoil.