Our portable one-station hand wash stations include hand soap and paper towels, as well as water tanks for both fresh water and wastewater, so no additional supplies are needed. Our portable four-station sink pods include hand soap, paper towels, water heaters and wastewater tanks, but they require both a power and water source. These sink pods can be powered by a 110-volt electrical plug-in, solar power or propane, and they require a water supply by an onboard tank or garden hose.