The 0,05 ml calibrated drops are dispensed by exerting a slight pressure on the fins at the sides of the dropper. Dispensing of constant 0,5 ml doses is achieved by fully pressing down on the fins, and consequently squeezing the dropper. A pin is fitted on the inside of the tip of the tamper-evident cap to ensure perfect closing and full sealing of the dropper. The bottles for pharmaceuticals are available in different shapes and sizes from 10 ml to 250 ml. Depending on the product containers can be fitted with droppers, adapters, small pumps, screw on and tamper-evident cap.