Zip-Seal Plastic Bags
These feather-light containers hold things like first aid supplies, pills, and other small items that need to be kept together in a dry place. You can reseal them over and over. They're made of strong 2-mil waterproof poly. The 2"x3" size weigh 3/100s ounce each., and the 3"x5" size weigh 9/100s of an ounce each.
