Vitra Tip Ton Chair by Barber Osgerby. Tip Ton is a solid plastic chair with forward-tilt action. From a normal position, Tip Ton can be tilted a few degrees forward where it then stays in place. The innovation behind this seemingly simple feature lies in the skids, which rise at a nine-degree angle. The forward-tilt sitting position, straightens the pelvis and spine and thus improves circulation to the abdominal and back muscles. Tip Ton can be used for dining or in the home-office. Manufactured from a single mould without the use of mechanical components. This makes it extremely durable and up to 100% recyclable.