5 gallon water cooler caps (RK-Z7) 100% PE new materials,blue and white ... ,can use with heat sticker and foam 1. 5 gallon water bottle caps ,include cap ,inner plug with buckle ,can print ... .Applicable to within five gallons of bottled water (mineral water,distilled water, pure water, spring water, magnetized water etc drinking water) packaging use. 5.we also supply ...