Abstract: A sipper cup including a cup assembly having a plurality of threaded grooves formed adjacent a top opening thereof. Further provided is a cap assembly having a spout integrally formed on an upper surface thereof. The cap assembly is equipped with a plurality of threaded grooves for allowing the screwable coupling of the cap assembly with the cup assembly. Such threaded grooves of the cap assembly and the cup assembly are adapted to allow air to pass therethrough. Also included is an elastomeric insert including a spout valve for allowing fluid to exit the spout of the cap assembly only upon the application of suction. In use, air is allowed to enter the cup through the threaded grooves thus compensating for the vacuum formed in the cup assembly upon the exiting of fluid from the spout.