Lift wheel lock for installing and/or removing vaporizer vessels

A delivery system comprising:

• a handheld electric lift configured to lift at least one vaporizer vessel;
• and
• a cabinet configured to hold the at least one vaporizer vessel,
• wherein the lift includes an elongated mast;
• an effector attached to the mast, the effector being controlled by an electric power source to move along the mast;
• a handler configured to move the lift;
• and
• at least four swiveling casters, including two swiveling, locking casters,
• wherein each of the two swiveling, locking casters include a stopper and a wheel, the stopper is elongated vertically and is disposed above the wheel, the stopper is configured to engage with the wheel to prevent the wheel from swiveling when the stopper is pushed down and fully engaged, the stopper is further configured to disengage with the wheel to allow the wheel to swivel when the stopper is released, the stopper further configured to allow the wheel to roll when the stopper is pushed down, the cabinet includes at least one channel comprising a top wall and configured to accommodate a swiveling, locking caster of the two swiveling, locking casters.