Hello, well, I'm just coming back from the Müritz and unfortunately have had bad experiences with the newly acquired 5L fuel canister. Somehow it doesn't hold tight. The threads of the "double screw lock" were very difficult to interlock. Despite very tight tightening (when the thread then gripped), fuel repeatedly leaked out of the closure. So I bought a canister from a well-known manufacturer on site. Schol. SVB: Has the rubber seal been lost? Please check again and report to us if necessary.