A disposable drinking device comprising a cup is disclosed. The cup defines a cup cavity and comprises a cup opening communicated with the cup cavity and a cup brim annularly associated with the cup opening. The cup brim comprises a brim curl having a lip configuration and a flare configuration. When the brim curl is in the lip configuration, the brim curl arcuately and concavely extends away from the cup opening to form a brim lip. When the brim curl is in the flare configuration, the brim curl arcuately and convexly extends away from the cup opening to form a brim flare. The described configuration results in the cup brim being destroyed when the lid is removed from the cup, making subsequent re-capping impossible.