The 16oz Narrow Mouth Sustain Water Bottle from Nalgene is an innovative drinking bottle that is manufactured in an environmentally friendly way. The Sustain product line bottle is made from a material derived from 50 percent plastic waste (using ISCC-certified mass balance), further offsetting the use of fossil fuels and reducing greenhouse gas emissions. It also eliminates the use of harmful plasticizers such as Bisphenol A (BPA) and Bisphenol-S (BPS). The mouthpiece is narrow, making it comfortable and easy to drink from the bottle and has a screw cap. The Tritan Renew material has properties such as lightness, break resistance and is neutral in taste and odor. Thanks to the semi-buttress thread, it is leak-proof - ideal for on the go, so nothing can leak.