Abstract: A spill-protecting top on a drinking vessel with an opening at a suction spout for drinking fluid, with which a fluid passage between the opening and the drinking vessel is blocked by a closure body of a valve, which is pressed by a spring element against the scaling seat in the fluid passage, and wherein the closure body comprises a projection which with an actuation section projects up to in the region of the opening, and which presses the closure body, on actuation of the actuation section from the outer side of the opening, away from its sealing seat against the effect of the spring element by which means the fluid passage between the opening and the drinking vessel is unblocked.

Abstract: A mechanism for displacing a pipe snake comprises a roller set of at least two opposite rollers adapted to roll against the pipe snake and being reversible such that they selectively advance or retract the pipe snake. Also provided is an eccentric drive which periodically imparts to the pipe snake longitudinal hammering movements in a direction opposite that in which the snake is being displaced to facilitate travel of the snake.