I was looking around Rite Aid (similar to Long's Drugs) and found this cool looking syringe ($1.99) for dosing Flourish Excel for my nano. This thing is perfect for taking out anywhere between 1ml-10ml exactly. It even comes with a cool gadget (white funnel thing), that you plug into your bottle, flip the bottle upside down, and use the syringe to withdraw a specific amount of liquid.
I think I'll use this for dosing Excel and prime for now on! No more drippy caps and measuring out 1ml based on lines on a cap for me.