[Closed] "Thermos Flask that wont leak" - Recommendations Please

I've just posted this on the bike forum, then thought maybe I should have posted it here instead (and I may get more of a chance of a good reply this way too).I've had loads of flasks over the years and they always leak all over the camelbak at some point.

I like the ones that you don't have to unscrew the lid to pour a drink, but if I can't have this then I'll live with it. It goes without saying that the flask needs to take a few knocks too. I always pack soft stuff round the flask before anyone says it is a dangerous thing to do.

Has anyone found the "Chris King" of thermos flasks?

Thanks for looking.