The narrow mouth on this 32-oz. bottle from Nalgene makes for an easy drinking experience. The closure and bottle create a leak-proof system with no O-rings that can fall out. Bottle is dishwasher-safe and made with Eastman Tritan material to be super-durable and resistant to tastes and odors. Superior impact-resistant, as well as suitable for both warm and cold beverages, the 32-oz. narrow mouth bottle is ideal for year round use. Convenient loop-top design means you'll never lose the lid. It is also marked with milliliters and ounces for easy measurement. Resistant to staining and won't retain odors. Max temperature: 100°C/212°F. Min temperature: -40°C/-40°F.