Don't need to wet it and put it in a baggy; just take it in a restroom when you need it or even from a water fountain. Wear it wherever you need it, as a bandanna, shoal, etc. My wife would put it around her neck or lay it over her arms when they got hot. She said the coolness stays with you a while. For a while, she had it around her neck like a scarf and tucked the front of it down inside her shirt. Whatever works and keeps you the coolest.
Also, if you don't know where they are located in
Walmart and most associates probably won't know either, just go to the Walmart website, do a search and order for pick up today in your store. The order goes directly to that store and shows up on the screen of the hand held terminal of the associate who pulls it from the shelf. The screen tells them where it is located. Within four hours, you get a message that it is ready for pick up and you just go to the "Site to Store" location and pick it up. That way, you don't have to run all over the place looking for it.