I take a look at a bag called the Milbank bag. This bag was designed to carry cooking items or water purification items in and not only be used as a carry bag but also a pre-filter. I put this item to the test for the first time and was very pleased with the results. take a look at the following links for more info and ordering. http://millbankbagsusa.com/
Made in the U.S.
Double Stitched
Heavy Cotton Canvas Material
Attention to Detail
1 yr. Warranty on Material and Workmanship
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Millbank Water Bag