Zoo Meds Drippers simulate natural rainfall and provide humidity for captive reptiles. The Dripper has a folding handle lid that allows you to suspend the dripper above the enclosure. Especially helpful for animals that do not readily drink standing water and instead drink dew" from leaves (i.e. Old World Chameleons). Our Drippers are available in two sizes the one gallon "Big Dripper" and the 70 oz. "Little Dripper"."