The Under Armour hydration bottle line from Thermos was built with the active athlete in mind.Athletes need to perform their best, and that starts with proper hydration.THERMOS vacuum insulation technology delivers maximum temperature retention every time so that your drink stays cold the entire time you're training or competing.The Under Armour 470ml vacuum insulated hydration bottle will keep cold for up to 14 hours and features durable double wall stainless steel construction.The push button lid is easy to operate with one hand and includes a locking ring to keep the lid secure during transport.