The Big Dripper and The Little Dripper Drip Systems Zoo Med’s new 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 those animals that need more of a tropical environment. Our Drippers are available in two sizes, the one gallon Big Dripper and the 70oz Little Dripper.