PREMIUM STAINLESS STEEL MATERIAL - Klean Kanteen bottle is made of heavy duty 18/8 stainless steel, which is durable and free of BPA, BPS, and phthalates Practical sports closure: the Flip Sport closure offers a convenient way to open and drink the bottle with one hand, ideal for cyclists, runners or sportsmen COMPACT SIZE FOR TRAVEL - With a volume of 12 ounces, this bottle delivers the perfect amount of liquid for short trips or everyday use SUSTAINABLE & ECO-FRIENDLY - This reusable stainless steel bottle is an eco-friendly alternative to disposable plastic bottles and helps reduce the environmental footprint The narrow neck of the bottle makes cleaning easy, while the stainless steel surface does not absorb odors or stains, keeping the bottle always hygienic and fresh