Originally Posted by MAMMY6
I use a type of foam board sold at Hobby Lobby. Lately they've had a display in the middle of a main aisle-it sells for $1.99. You can cut it with an xacto knife. I make a sleeve out of matching scraps and glue it closed. There is no odor if it gets wet and 1 sheet will go a long way. Good Luck!!
As I said before I use the plastic canvas and make a sleeve to slip it in. For the folks who glue the end of the sleeve. Why do you do that? These bags are washable so I figure if the sleeve gets dirty you can throw that in the wash too. Can you still wash it if it's glued shut? Just wondering. :D