There is described an opening device for a package having a designated pour opening and being filled with a pourable product. The opening device comprises a contact portion and a closing element detachably and/or rupturably attached to the contact portion and configured to close the designated pour opening. The closing element comprises a central main wall and a plurality of leg elements connected to and extending from the central main wall. The central main wall comprises a plurality of radially extending ridge elements, each one being interposed between one respective leg element and a center of the central main wall and a plurality of grooves, each one extending between one respective pair of leg elements.

A beverage drinking apparatus has a container, a spout, a straw and a cap, and allows the user a choice of drinking method. When the user turns the cap in a first direction, the straw extends from spout for the user to drink from. When the user turns the cap in a second direction, the straw is removed from the container, allowing the user to drink from the spout.

A closure device for closing a container. The closure device includes a basic member, a closure cap, an anchor ring and a connecting device. The basic member has an additional support arranged axially between a fastener and a first guide. The support has a first surface element with a surface normal which points in the direction of a pouring plane. The closure device is configured such that, in the open state of the closure device, the closure cap can be brought into a first position in which the closure cap abuts neither against the first surface element nor against a first edge bounding the first surface element, and can be brought into a second position in which the closure cap abuts against the first surface element or against the first edge or against the first surface element and the first edge.