The crystals are easy enough to order or you can buy small packages from Lowes. They are the water absorbing crystals that you use in plants so you don't have to water them daily.
Our troops are in twice the heat we are. Think about that. They are not able to get into air conditioned buildings to get away from the heat, so this is a little way for me to be able to help them.
GOOD JOB, Jabear!!!