Menda one-touch pumps are not recommended for use with acrylic liquid and patented one handed operation frees operator's hands. It has precision machined valves for smooth consistent operation and cam-lock hinge keeps lid open and closed, reduces odors. - No silicone or latex - perfect for ultra clean environments and fits all standard Menda HDPE, glass and steel bottles. It dispenses approximately 0.2cc of liquid with each pump 100% and stainless steel will not corrode or contaminate liquid.