I bought it online @REI but since i dont live in the US i contacted Tr.se
i was negatively surprised to get their response.
here is what they wrote back:
"...The burner you got is not defect. The piece is not a leak proof unit. We recommend only to store fuel in it on camp site and not to pack it down in to the stove set with fuel in it. It can leak, and if it do it gives a really bad taste to the pots. If you still have any concerns regarding the burner please contact the retailer you bought it from...."
I have heard that people carry fuel in it with no problems...but the fact is that I have a leak and it renders the stove semi useless (cause if i wanted to carry a fuel bottle for an overnight trip there are countless much lighter stoves to be had.
i emailed them back saying i am disappointed and received the below:
"Im sorry that you´re disappointed, but the only thing I can tell you is that you can store fuel in the burner and reuse, on the campsite. The lid protect the fuel from evaporates. You can´t, and should not pack it down in the set (even if I know many do and some burner IS tight enough not to leak)
We recommend to always store fuel in a bottle , you can find small ones on the market .( Our smallest takes 0,3 dl ) This also prolongs the lifetime of the burner and prevent corrosion which can be caused from the water in the fuel."