Our Dansha Farms™ “Patent Pending” Battery Powered Milk Machine With Rechargeable Battery Pack Can be Used “Any Where Any Time”. Accepts US Power or European Power. You Can Get Extra Battery Pacs for Milking Multiple Animals. When We manufacture our milkers we use polyurethane cement under the lid for two reasons to provide a rigid lid and also to provide an air tight seal. The cement will harden and become inert. It will not smell or harm your milk. Were Here To Keep You Milking !!!