Since the original pattern is only two to three inches tall, I had to modify it a little. I added about five or six rows, which caused it to increase in both height and width, and my resulting water droplet looks like this:
My water droplet is rougly half a foot tall, which still seemed a little on the small side, but the NHS officers seemed to accept it, so hopefully they won't ask me to redo it. I'm not completely sure what this publicity project is, but I'm happy to have made my contribution.