The FILL ME bottle is a Swiss invention. It is the world's only swing top bottle made of borosilicate glass. This is much lighter than normal glass. In addition, the smooth and non-porous surface of the glass prevents germs and fungi from sticking, which is why it is also used in laboratories. Due to the high heat resistance of the borosilicate glass, the bottle is also suitable for boiling hot drinks such as tea. And thanks to the clip lock, it can be easily opened and closed with one hand. At the same time, the closure serves as a handle. In addition, CHF 1.– each bottle is donated to DRINK & DONATE, a non-profit organization that gives people in developing countries access to clean drinking water.