#1774: Levelens

Today’s invention is simply to reuse contact lens containers as 2-dimensional spirit levels.

These are often hemisperical and with a central mould flashing so that the position of the water level inside relative to this can be judged by the human eye very accurately.

Such a system would make it possible for all sorts of products to incorporate a number of integrated levels…at very little cost.

Once the device or system (think picture frame or washing machine) had been correctly orientated, the cases could be removed and thrown away.