Mine came with a little piece of rubber tubing that fits over one of the ends, I just put that on there up to the line on the vial and snap the end off. Then I point the open end at the cup of tank water and do the same thing on the other end, with both ends off the liquid just pours out. For the Reef Booster I use a towel to snap the small end off and pour.
I posted my before pics in the Iwan thread, but I'll probably post them in here too.
Rich