Since i made the post yesterday about the lightweight brew/cook kit i made from junk, I've had a couple of mails from people asking for more detail on the lid i made from the top of a Tuna tin, so here it is for your viewing pleasure.
The lid was removed from the tin using a side cutter type of tin opener, this is important for two reasons, One - you retain the lip which adds strength to the lid, Two - you tend not to get a razor sharp edge on the lid.
The lid was at first slightly smaller than the diameter of the cup, meaning that as soon as you put it on top, it slid down inside, easy to fix though, all i did was to go round the circumference of the lid about a dozen times with a rounded piece of metal and slowly worked the lip outwards until it got to a stage where it no longer fell into the cup, but sat on the top, well it actually sits just down inside the lip of the cup, which works really well.
Once this had been down and any rough edges smoothed off with a piece of 120 grit sand paper, i drilled out three small holes to use as a strainer / steam escape holes, which help stop the lid rattling around on the cup when it reaches a boil and then drilled a small hole dead centre and made a knob from a small piece of seasoned hazel, which is attached via the hole with a small stainless steel screw.
As you can see from the photo, it all goes together quite well and i can still get everything mentioned in the original post about this kit, inside the cup, all i have to do when putting it all away, is to put the lid on upside down.
Hope this makes sense to those people who asked for more information?.