Nalgene BPA free Tritan copolyester bottles are about the most robust, leakproof & reliable plastic drinks bottles available. Other plastic bottles have come & gone, but our trusty Nalgene just keeps on working. This model has a narrow opening to make drinking easier. Made from Tritan they are super tough & resistant to tastes & odours. They can be cleaned in the top rack of the dishwasher (keep lid away from heating element) & withstand temperatures from -40 to 100ºC. Handy graduation marks in milliliters & ounces are really useful when making up packet foods. made from Eastman Tritan copolyester, & is BPA Free Dishwasher safe (top rack only) Just make sure the cap does not touch the heating element Everyday bottles have superior impact resistance & are suitable for both warm & cold beverages Convenient loop-top design means youll never lose the lid Narrow mouth is easy to drink from Marked with millilitres & ounces for easy measurement