I just recieved my fina kit today from GPZ and I was going through it to make sure everything was there. It has a reddish rubber thing in there, what is it used for, looks like it goes on top of a vial or something? Also, it came with two 18 gauge needle tips and one 25 gauge needle tip. Which ones do I use to stick in the top to relieve the pressure and which one is used to draw with and push with? Also, do any of yall know where I can buy a funnel from that will fit into the vials? I checked Lowe's hardware store, but the funnel they had was too big, maybe wal-mart or another hardware store? I forgot to buy one with my GPZ kit.