Replenishment is the name for putting new supplies in, or filling something again — the act, and sometimes the new supplies themselves. Shops talk about stock replenishment: vans come at night so the shelves are full in the morning. Hospitals wait for the replenishment of medicine. It sounds official, like business, stores, or the army, not like kitchen talk. If you only need a verb, that verb is replenish; this word is the noun you can count as a process or a delivery. Though actually, people stretch it a little: “replenishment of energy” after rest is the same picture, just not boxes on a shelf.