What is Refill?
Refill is 1. a container with a fresh quantity of liquid I must get a refill for my cigarette lighter. Liquid soap is sold in handy refill packs. 2. another drink Your glass is empty can I get you a refill? (verb) to fill something again The waiter refilled our glasses. We stopped twice to refill the car on the way to Scotland. Synonym replenish. Antonym empty
source: Easier English, Student Dictionary Upper Intermediate Level