I was gifted one of these by a good friend last Christmas and my dad liked it so well I thought that he was going to claim it! So I did a bit of research on the tritium and joined this last drop. I'm not sure I've ever seen more people complaining about nothing than in this discussion thread (actually, seeing internet comments and conversations over the past two years, that might not be true). But seriously - I joined this drop just like any other and then spent a total of 5 minutes ordering my vials from mixglo.com (I looked at tritiumkeychains, but they seem to be out of red tubes (lol) at the moment). Now all I have to do is wait. I can't believe all of the negative comments when it's been clearly explained several times that the vials cannot be sold within the US. All this complaining about the hassle of having to source them separately - seriously, I was able to join the drop and order the vials in under 10 minutes. Maybe a bit longer if you're really indecisive about which color(s) you want.