Mini-Fridge

Allows you to store additional ingredients for cooking.
Overview
The Mini-Fridge is a piece of furniture that expands the player’s refrigerator storage for cooking. It provides 36 inventory slots and functions like a regular refrigerator: any cooking ingredients placed inside can be used for recipes as though they were in the player’s inventory. This makes it a convenient way to keep extra ingredients close at hand without carrying them around.
A Mini-Fridge can be obtained from the Carpenter’s Shop after upgrading the farmhouse, or sent by mail after completing the 
Because it works as a cooking container, the Mini-Fridge is most useful for ingredients that are frequently used but not always kept on the player’s person. Players can stock it with crops, fish, and other cooking items to make meal preparation faster and reduce inventory clutter. Since it mirrors the behavior of the main refrigerator, it is especially helpful once the number of available recipes begins to grow and cooking becomes a regular part of farm management.
Official description
Allows you to store additional ingredients for cooking.