Then fill it and as many clean bottles as you can with drinking water. Dry Ice Dry ice can keep food in a cooler frozen for about a week. Place it on top of, not under, the material. Open cooler only when necessary. Dry ice will not harm frozen food.
Some places have a minimum purchase.
If not kept at -109 degrees, a block begins to convert back to gas at a rate of about 10 pounds per 24 hours. Please read it.