Shot glass measuring sleeve

This cool kitchen gadget turns an Ikea shot glass into a measuring cup.
The sleeve fits right over an Ikea Pokal 5cl shot glass. The steps show the
filling level for each amount starting from 5ml to 45ml in 5ml increments.

Here are the links to the Ikea webside with the glasses.
Ikea pokal shot glass:
- DE: https://www.ikea.com/de/de/catalog/products/90091996/
- USA: https://www.ikea.com/us/en/catalog/products/90091996/