Container system

A container system, comprising:

• an upper container;
• a clip body with a top side attached to a bottom of the upper container and a bottom side configured to attach to a top of a lower container, the clip body including:
• a plurality of outer securing structures formed around a substantially circular outer perimeter of the clip body, each outer securing structure including an outer tab, a ledge formed at a bottom end of the outer tab and extending inward toward a central region of the clip body, and a wing extending from the outer tab away from the clip body, wherein the wing is configured to flex under an influence of a digit of a user to bias the ledge away from the central region of the clip body;
• wherein
• each ledge grips an outer lip of a circular rim formed on the top side of the lower container, to thereby releasably grip the lower container.