The HidrateSpark V3 Bluetooth® Smart Water Bottle 20oz glows when it’s time to drink. Set it to remind you at scheduled intervals and track your water intake by syncing via Bluetooth® to the free HidrateSpark app. Customize this bottle by selecting from three unique light patterns. Its long-lasting replaceable battery provides an extended operating cycle and is conveniently located at the bottom of the bottle, so you can easily replace it without missing a beat. This BPA-free bottle features a silicone sleeve that improves grip and minimizes condensation. Fits most standard cupholders. Recommended to hand wash only. Sensor can be hand-washed. Do not use product with hot liquids.