Proper hydration plays a key role in a healthy lifestyle and the Thermos brand 355 mL FUNTAINER bottle is a great product to fulfill any on-the-go hydration needs. Constructed with durable stainless steel and THERMOS vacuum insulation, this bottle keeps beverages cold for up to 12 hours. It features an integrated carrying loop and hygienic push button lid with a pop-up straw that is easy to open and comfortable to drink from.