https://www.rosieonthehouse.com/faqs/what-can-safely-store-in-my-attic

What can safely store in my attic?

Glass items like bottles, metals like house fans and Christmas tree stands, most luggage  and other items that seem pretty indestructible will live happily in an attic. 

Anything made from paper, fabric, leather or wood has the potential of damage from heat, frost, moisture and bugs. If you must store those things in the attic, protect them by enclosing them in a tightly sealed, high-quality plastic, glass or metal container.
 
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