Abstract: A one-piece, quickly resettable gravity-flow timer consisting of a sealed container which integrally houses a base at one end and a reset reservoir at the other and, intermediate these, a receptacle, having a loading orifice nearest the reservoir and a metering orifice nearest the base. The receptacle is partially defined by indentations fo the container in such a way that all flowable medium in the base is instantly directed around the sides of the receptacle, through return channels between the two side walls of the container and the receptacle, and into the reset reservoir upon any manner of inversion of the timer. Partial definition of the receptacle by such indentations makes the timer manufacturable in two-part molds. Baffles between the reservoir and the body of the timer define an aperture positioned above and many times smaller than the loading orifice of the receptacle and direct and flowable medium into the receptacle when the timer is returned from an inverted to an upright position.