a) all rotating disk with stainless steel SUS304 welded together. b) using this company original tilting bottles, bottle clamp stuck bottleneck, avoid the traditional bottle on rubber clip to block the bottle threaded parts may be caused by the pollution. Bottle holder is made of stainless steel SUS304 manufacturing, health, and durable. c) by high spray nozzle, blunt bottle of water jet angles, flush to the bottle of any part of the inner wall, rinse with water thoroughly and save flush bottle.