Eva Dry These place anywhere tubs are filled with silica gel crystals that get rid of dampness and musty odors! Place in closets, under sinks, storage bins, campers, etc. Absorbs 4 to 6 ounces of moisture and lasts up to 60 days. Indicator beads will change from orange to green when it's ready to dispose. Set of 2 tubs (4 dia. x 3 each) are non-toxic, spill-proof and pet-safe.