Se class sprayer, but what a transparent level strips ???

So I can through the transparent strip level (it is more than transparent frosted glass) guess in clear content not even how full the bottle. That's just when dosing the appropriate agents a major obstacle, so I have to handle with additional measuring cup. Too bad. Otherwise convinces me this 1l pressure sprayer even more than the 5-8l Drucksprühflaschen.

EDIT 27/06/2014:
For faster inflation I have now violated three times on the bottle. Subtracting the piston somewhat jerkily up to the upper stop, disengages the coupling mechanism of the pump handle and one digs up the knee-jerk further pumps the finger at a very sharp sucker rod, better: the plug-in mechanism on. VERY PAINFUL!

Have been fixed for its own protection with 2-component glue to plug-in mechanism. Why Gloria makes it not work out?