Most of unmanned builders always need to measure if this and that are in level. Well that sparked an idea. Why not to look small water level gauges for swag shop. First batch is about to come. Here is some pre-shots
They are 16mm in diameter and 6mm high…
Text is laser engraved on top of the lens. It be colored too to enhance the text. Or in future we can have silk print on them too.
Ideas, comments welcome