The 5 Gallon K-Seal is a liquid proof Snap-On tamper evident closure designed to provide suitable sealing for use on HOD water bottles (PC or PET) in conjunction with liquid product (water) which is both inert and none carbonated in nature. When applied under the correct conditions the tamper evidence is provided to the caps by means of a visible tear line and to the non spill plug void by means of a single stick label which when removed allows the closure to be installed to most water cooler assemblies creating a non-spill design.