10ml bottle of ink to refil your stamps!
 
Simply open your stamp so you can access the stamp pad face. Turn your stamp upside down and place 3-4 drops of ink directly onto the stamp pad face and move it around with the tip of your dropper. Wait 10 minutes and then wipe off the excess ink. You'll need to use your stamp approximately 5-10 times on some scrap paper to get rid of all of the excess ink.
 
One bottle will refill your stamp at least 2-3 times.