A dispense system such as an aerosol or pump system includes a container having an upper rim, a collar secured to the upper rim, and a cap removably attached to the collar. The collar may be rotatably secured to the container such that when the cap is rotated, the cap and collar rotate together about the rim of the container without detaching. The cap may enclose an actuator or pump of the container preventing inadvertent dispensing of the contents as well as rendering the container more tamper resistant. Each of the cap and collar includes various features to interlock with one another. In one variation, the cap includes at least one tooth which engages a slot or an opening in the collar to achieve locking. The cap may be rotated or snap fit into place depending on the variation. Caps that are directly mountable to a rim of a container are also disclosed.