PÜL SmartCap

The PÜL SmartCap turns any wide-mouth water bottle into a real-time hydration coach. It senses every sip, glows with instant feedback the moment you drink, and pairs with the PÜL app to train better hydration habits over time.

Highlights

• Feedback in the moment. The cap glows the instant you drink — using temporal contiguity to lock in the habit while it forms.
• FlowSense™ sensing. Accurate volume tracking on every sip, sent straight to the app.
• Weeks of battery, always connected. Bluetooth pairing with a charge that lasts weeks, not days.
• Antimicrobial and durable. A food-safe, compact cap engineered to survive daily use.
• Fits any wide-mouth bottle. Works with bottles you already own, with swappable, customizable accessory straps.
• Coaching built in. Pairs with the PÜL app for personalized targets and adaptive training.

From prototype to production

Getting a sensor this small to be both rugged and precise was the hard part — and taking it from concept to a manufacturable design was the rest.

• Durable and precise. A compact cap that holds sensing accuracy through the abuse of everyday carry.
• Lean to production. In-house prototyping — SLA printing and prototype injection molds — drove the design from concept to a DFM-ready product.
• A data platform behind it. Every sip feeds precise hydration metrics to the app and a web dashboard for individuals, teams, and research studies.

Recognition

Covered by the Wall Street Journal, Fortune, TechRepublic, and more, the SmartCap pioneered a new category of connected hydration and powered health research with precise, real-world metrics.

Impact

The SmartCap shipped to thousands of customers — trail to tennis court, gym to desk — turning hydration into something people could see, share, and improve. The same precision that made it a daily habit for individuals made it a research-grade instrument for the teams and universities that adopted it.