• 22 oz. single wall Tritan™ Plastic water bottle. • Screw on Cork lid. • Hand-wash only. • Do not place in freezer or microwave. • Cork portion of cover is made of 100% Cork, and is not treated with any chemical additives. • Cork is an Eco-responsible material sourced from the bark of Cork Oak trees. After the cork is harvested from the tree bark it regenerates. The tree not only continues to live after the cork is harvested, it can be harvested approx. every 9-12 years, throughout its life which can be anywhere from 150 to 300 years.