OK, so much for my durateston250 question, thanks to those who bumped it though...
The same guy gave me more yellow tops too, and of course these are not the same as I had before. The vial is shaped slightly different, the label doesn't go all the way around the vial and the ends are rounded, and the top says "flip off". The others did not.
Should the top have said "f*** off" instead, as in you've been scammed?