The Nalgene® Sustain Bottles are made from the newest material in the Nalgene® line. BPA FREE, it's made from tough, translucent Eastman Tritan™ copolyester, and is tough and impact resistant, dishwasher safe, durable, and won't retain taste and odors. To be more sustainable, these bottles are now made from 50% recycled material.Convenient wide mouths with security loop (so you don't lose it) are guaranteed to be leak proof. The side of the bottles are marked with graduations for measuring. They are the same size as the old Lexan models and, of course, fit into the same mugs and pots as the old Lexan ones. Dimensions: 8" x 3-5/8" diameter.