How do you keep things cold without a cooler?

How to Keep a Lunch Cold Without Refrigeration

Loose Ice. An old-school solution, loose ice spells disaster. ...
Lunch Bags With Ice Packs. Some people try lunch bags with ice packs to keep their food cool. ...
Frozen Water Bottles or Juice Boxes. ...
Freezer Food. ...
Thermoses. ...
Coolers. ...
Bento Boxes. ...
How Do I Freeze My PackIt Lunch Bag?

How do you keep food cold without a cooler while camping?

Bringing along packs of dry ice is smart and helps your food last longer with less space consumption. Make sure to only use top-quality dry ice because it comes in contact with food and beverages. Always buy a few more dry ice packs for backup because they are low cost and can be fit into small spaces.