CG ENG- thats pretty small.. depending on the climate try this..
Get an Altiods can (mints right?) take off the lid..
Cut your foam the height of the can but a little larger lenght and width.. use the can like a cookie cutter and press it down ito the foam.. you will have a perfect little humidifier for about 15 cents minus
cost of the mints of course..
Has worked great for me..
cayman