Vintage large glass storage jar in cobalt blue

Cool, these old (80s) pressed glass jars from Belgium. The other storage jars are often with a convex lid, this is a nice flat one. We never actually come across this one. The cap is also completely intact on the inside!
Its volume is approximately 1 litre.

Size: 3.9inch x 9.3inch / 10cm x 23.5cm