Tips and techniques
The basics
Cap mounting.
When I first tried to get a cap on a can, I was quite glad that I didn’t do it inside. Just pushing down also opens the nozzle. The trick is to twist or «screw» the cap onto the can (which is at the same time the easiest way to get caps off a can again, which can be quite hard e.g. on sabotaz cans). Holding the cap so that one finger covers its dot provides additional security.