The narrow mouth makes for an easy-breezy drinking experience. Made of Eastman Tritan copolyester and is BPA free Dishwasher safe (away from heating element) Superior impact resistance Suitable for both warm and cold beverages Convenient loop-top design means you'll never lose the lid Narrow mouth is easy to drink from Marked with milliliters and ounces for easy measurement Resistant to staining Guaranteed leakproof, includes tethered cap Made from Tritan and is BPA, BPS, and Phthalate free Will NOT fit standard water bottle cages Dishwasher safe Temperature range is -158F to 212F Permanent graduation for easy measuring