2. Alcoholic Beverages
Alcohol expands when frozen, and tightly sealed bottles can explode. Additionally, alcohol is flammable, posing fire and explosion risks if a spark occurs. Keep these beverages at room temperature or cool them with ice.
3. Dry Ice
Dry ice (solid CO₂) expands dramatically in a freezer, which can lead to explosions in a confined space. Never store it in a sealed freezer. Always use insulated containers and handle with gloves or tongs to avoid burns.