Exactly, but as a VPP based on SHIELD armory, grenades is a no brainer.
This is Bandit's VPP
Equipment Pool: Variable Power Pool, 40 base + 30 control cost, Powers Can Be Changed As A Zero-Phase Action (+1), No Skill Roll Required (+1) (85 Active Points); Maximum of 15 Real Points (-1/2), Armory Based (-1/4), Only Found Ultra Tech (-1/4), Kit Load (-1/4)
Nick would have something similar, probably just Armory and Kit load limitations
As for your concept, as I understand it. I would use UBO with the potions being an F/X, as it seems your goal is to give powers out, not to have them yourself and occasionally loan them out