Refillable (adjective)

1. Capable of being refilled or filled again after being emptied.
2. Designed to be filled again after being used.

Origin:

From re- "again" + fill + -able.

Examples:

1. The pen was refillable and could be used for a long time.
2. The refillable water bottle saved money and reduced waste.
3. The refillable gas cylinder was more cost-effective than buying new ones every time.
4. The company sells refillable cartridges for the printer.
5. The refillable coffee cup was a great way to reduce waste.