The One Dip Wonder really is a game changer. Having to dip your pen in ink half-way through writing can ruin your flow, cause an inky mess and take up your precious calligraphy time. The One Dip Wonder combines the perfect size spring with a tiny but powerful neodymium magnet, creating a reservoir of ink for your calligraphy pen. All you have to do is pop it onto the back of the nib (underneath the vent hole) and you're ready to go!