100% Self Cleaning. Eliminates cleaning, disinfecting, filling, and transporting hundreds of pounds of ice. Combines salt water chlorination, mechanical filtration, antibacterial coating, and built in sanitizer measurement to make it virtually maintenance free and 100% self cleaning. Methicillin-resistant Staphylococcus aureus (MRSA) is totally and immediately neutralized by the COLDTUB™ water treatment system. Oxidation-Reduction-Potential (ORP) of the water can be monitored and digitally displayed. No daily draining!