Surplus ammo cans ? https://www.amazon.com/CNU-405-Ammo-Can-Grade/dp/B00A9TLYOI https://www.amazon.com/NRS-Surplus-Rocket-Box-20mm/dp/B004FQ6ENW https://www.amazon.com/Fat-50-Ammo-Can-Grade-2/dp/B00ANTC1KA The 50 cal ammo cans lids are removable and are gasketed ? others are probably as well. Can probably find cheaper if there are any gun shows still allowed in Ill ? Otherwise https://www.armysurplusworld.com/gi-surplus/ammo-cans https://www.cleanammocans.com/Ammo-Cans.html | 
Waterproof enclosure for 12V Milwaukee tool battery charger?
