A container cap with integrated straw includes a cap body which carries a drinking straw and is attachable to a beverage container. The container cap engages a neck of the beverage container in a watertight seal to prevent spillage of the beverage from the beverage container during use. A cap retainer can embrace the container cap for enhancing the watertight fitting of the container cap against the neck of the beverage container. The drinking straw can include a distal closed end that opens in the event of user aspiration on the straw. The distal closed end can be provided on the straw or on a disconnectable straw extension.