Safely transfer liquids up to 4 litres per minute.It avoids to swallow harmful liquids. Simple and safe to use, suitable for: gasoline, diesel, oils, water and many liquids. Clip stopper included. The hose with siphon eliminates the risk of ingestions of hazardous or nasty fluids. A simple jiggling action starts the siphon flow.It does not need to be placed in the mouth.