An integrated system that includes a container configured to store a consumable liquid and a flexible, expandable straw secured to the inside of the container for consumption of the liquid. The straw can assume a first collapsed position inside the container and a second expanded position (e.g., when pulled) that extends away from the bottom of the container and past an upper rim of the container for consumption of the liquid through the straw. Use of a flexible, expandable straw in the above manner facilitates stackability of a plurality of such containers by allowing the straw to initially be compactly stored adjacent an inside bottom of the container before being pulled outwardly to allow for consumption of the beverage in the container. Securement of the straw to the inside of the container reduces the likelihood of ingestion by animals and the like.