A last-minute plan to meal at the beach last Saturday in temperatures of below 10 degrees centigrade meant that my Primus 210 was definitely going to be needed for a round or two of hot drinks The only problem was that I had no idea what the fuel level of the tank was! I tried every way I could think of to see it, from holding it up to the sunlight, to shining a torch in and even tipping it up very very slowly until it began to drip out of the filler hole so I could make a rough estimate Finally I got pouring through a fuel funnel. This time I remembered to ensure air could escape from the centre (burner) hole by removing the travel cap. Sadly this didn't seem to work, as the moment I started pouring into the funnel, fuel came out of the centre hole. I finally realised that by raising the funnel slightly with one hand, so that it didn't seal the filling hole, the problem was solved - I am not sure why?? However I still couldn't tell where the fuel level was so I just had to guess! Does anyone have a good solution to this problem? All I can think of is the laborious process of empting the exisiting fuel out into a measuring jug then topping it up to 1 pint with new fuel, then pouring the whole lot back in. (Remembering to not let the funnel seat onto the filling hole!) I am sure there must be a better way, and if so I am equally sure that folks here will know it / them! Replies gratefully received, and maybe they will help others who struggle with these problems.