Preserver (noun)

A person or thing that preserves something, especially food.

Origin:

From old french preservateur, from latin praeservator, from praeservare "to preserve".

Examples:

1. A preserver is a device for preserving food by sealing it in an airtight container.
2. The jam is a perfect preserver of the fruits.
3. He is a preserver of the environment.
4. She is a preserver of the culture.
5. The National Trust is a preserver of historic buildings and landscapes.