Stay hydrated like never before with the 21 oz HidrateSpark PRO 2, the world's smartest water bottle made from premium recycled stainless steel. Double-wall vacuum insulation keeps your drink cold for up to 24 hours, while the PRO 2 sensor with SipSense technology tracks every sip and reminds you when it's time to drink with a customizable 360-degree glow and optional sound alerts. Sync your water intake with the HidrateSpark App via Bluetooth to monitor your progress, set personalized goals, and even locate your bottle using Apple's Find My Network. The large carry handle and narrow base make it cup-holder friendly and easy to carry wherever you go. Works with the chug or straw lid for ultimate versatility.