Gigs patent with old nichtbehobenen weaknesses

Had 2-3 such bags over 3 decades. There are I think all black solar showers identical despite apparently different manufacturers or inscriptions. This unfortunately has the disadvantage that the filling opening is very difficult to open. In cold conditions hardly or pliers and the risk of tearing (which also happened earlier). The tap closure can I find good, the shower head '' Well, yes', I have converted it to their own ideas. Otherwise, the part is below close close - but must depend !! Heats up well with moderate content. The plastic tube in the grip area should be replaced because unstable -knickt easily.