Not really Hannes.
There are no funnels.
Thirdly, that site has only a small selection of house-flags.
They are not sorted to enable you (except by chance in browsing) to find even the flag if you don't know the company already, and there is no guarantee that the funnel marking is the same - a sizeable proportion are not.
Most of the historical books on "flags and funnels" are, hovever, organised by colours and design of funnel marking.