this box or bottle contains 1d20 pills made of pure magic as a bonus action you can expend one pill and eat it rolling a d20 (if you have proficiency in the arcana skill you can roll twice and take either result) if the roll is higher then you con score you suffer magic overflow otherwise you choose 2 cantrips from any spell list you cast these cantrips for the next 10 minutes and con is spellcasting score for them and if your a spellcaster you regain a single first level spell slot

magical overflow

if you experience magical overflow you take 1d4 force damage and must roll as if you had eaten the pills twice more 

getting more pills

you can move the pills from any box of mage pills you have to any other one you have in addition a spellcaster with proficiency in arcana can expend a spell slot to add a number of pills to the box equal to the level of the spell slot expended minus 1