Manual filling aid with push button fill

An apparatus, comprising:

• a pump to pump liquid;
• a container secured to the pump;
• an interlock mechanism configured to release the container from the pump after the pump has pumped the liquid;
• a detachable connector detachably secured to the pump to enclose the container in the pump;
• the interlock mechanism being configured to prevent removal of the detachable connector after the pump has pumped the liquid;
• the pump including a container compartment;
• the container being received in the container compartment;
• the detachable connector including a catch clipped to the pump to enclose the container compartment;
• the interlock mechanism including a push button configured to manually actuate the pump;
• and
• the push button being moveable between an extended state and a depressed state to pump the liquid, in which the push button in the extended state blocks manual release of the catch, and in which the push button in the depressed state allows manual release of the catch.