Can I put my SIGG bottle in the freezer or subject it to freezing conditions?

NO. Placing a SIGG bottle in the freezer with liquid in it will cause the liquid to expand, causing extreme pressure on the inside of the bottle which may crack or split the aluminum. We've also heard instances of SIGG bottles cracking when left in the garage during winter, in the car overnight in cold conditions and cracking if placed in a cooler with ice. Quite simply, SIGG bottles and ICE / Freezing do not mix. You can put the bottle in the refrigerator though.