The HidrateSpark Steel 21oz Chug Lid is the perfect bottle to help you stay hydrated. Its LED Smart Sensor glows to remind you when it’s time to drink and tracks your water intake by syncing via Bluetooth to the free HidrateSpark App. This item features a rechargeable battery and includes a charging cable. Customize this bottle by choosing between unique glow colors and exciting light patterns available within the HidrateSpark App. This BPA free, vacuum Insulated stainless steel bottle is designed to keep your beverages cold for up to 24 hours and prevents condensation. Recommended to hand wash only. DO NOT submerge, wash, or get the sensor wet. DO NOT use product with hot liquids. LASER NOT AVAILABLE ON SILVER BOTTLE