The HidrateSpark 17oz Straw Lid has an LED smart sensor puck that glows to remind you when it’s time to drink and tracks your water intake by syncing via Bluetooth® to the free HidrateSpark App. It features a rechargeable battery and includes a charging cable. Customize the bottle by choosing between unique glow colors and exciting light patterns available within the App. This BPA-free, vacuum-insulated stainless-steel bottle is designed to keep beverages cold for up to 24 hours. The double-wall construction prevents condensation. Recommended to hand wash only. Do not submerge, wash or get the sensor wet. Do not use the bottle with hot liquids.