Smart CAP

The aim of „Smart CAP“ is the development of an intelligent filling level measure for PET bottles. These measurements enable the user to stay hydrated during the day. In case of dehydration Smart CAP sends a warning to the user, via an Android App and a LED lamp.

To realise this a PET-screw cap was designed, in which a distance sensor, as well as additional electronic parts, were implemented. The distance sensor can measure the space between the screw cap and the water surface, and can therefore measure the amount of fluid that has already been taken in by the user.


Smart CAP reminds people of a regular and sufficient fluid intake, which can easily be forgotten, for example, at work. Consequently, everyday life becomes more comfortable and most of all healthier. Sufficient water supply can, for instance, prevent headaches.