A drinking flask cap is a convenient, three-position, push-pull lid. The top of the lid forms a drinking basis, and the drinking basin can be sealed with a hygienic cap. The cap can be removed and placed on the bottom of the flask for convenient storage and provides a stable base for the flask. A bottle portion of the flask is preferably made from a molded plastic material and can be provided with a finger hold such that the flask can be drunk from in a manner similar to a coffee cup.