Baby Medicine Dispenser No leaks, no waste. Holds up to 5 ML. The Rumble Tuff Medicine Dispenser combines the benefits of a pacifier with a convenient medicine feeder. Easy-To-Use. Flip open the medicine Dispenser and pour in the medicine (or juice). It holds 5ml of liquid. Snap it closed to seal the opening. The long shaft keeps the liquid from spilling or leaking. Ventilation Shaft. The unique ventilation shaft prevents a vauum from forming while baby is sucking on the pacifier. It allows the Experience no leaks or waste with this effictive medicine dispenser. It's designed with a patented ventilation shaft that prevents a vacuum from forming inside the reservoir. This allows for the easy flow of medicine to your baby's mouth while preventing leaks and spills.