Abstract: A disposable cup assembly having an improved coupling system for connecting a container and lid together is disclosed herein. In some embodiments, the coupling system is configured to reduce or eliminate the likelihood of the container contents from spilling when the disposable cup assembly is tipped over or used. The container, in some embodiments, can have threading along the top portion of the container that can preferably be configured to couple with a lid having a threaded flange and can create a robust connection or fitting between the lid and container.