The present invention relates to a container (1) comprising a wall (2) having a closed base (4) at one end and a generally circular or oval rim (5) of at an opposite end, the rim defining a top opening (6) of the container. The container (1) further comprises an arrangement of flaps (70, 80) whereby the counteracting forces between a rim of a first flap (70) and the inner face of a second flap (80) are sufficient to push the respective rim and the inner face together into a tight contact. A closure arrangement (300a, 300b) is provided to restrict flap openings (100a, 100b) formed at or below the rim (5) of the container between the flaps (70, 80) to prevent splashing and reduce the rate of spillage if the container is knocked over. The present invention thus improves the spill-resistant properties for the container (1), while, if required for drinking or pouring, permitting the container to allow the passage of a liquid when tilted for drinking and pouring.