I received these Platinum Preppy Sign markers compliments of JetPens. They have a great feel, great ink flow, and have the added bonus of refillable ink cartridges and replacable tips. More details from JetPens:
The Preppy line from Platinum is so comfortable and practical that our customers have requested that we bring in the entire line. So now the Preppy fountain pen, marker, and highlighter are all available at JetPens.
The brilliant design of the Platinum Preppy Sign Markers is that they work just like a fountain pen! They use convenient ink refill cartridges. Just pop one in and in seconds the nib is filled and ready to go. The markers are great for frequent use because even the tip is replaceable. Even though they are made for the office, they are especially kid friendly because you can always replace the tip after they have been abused. Very economical and eco-friendly. Seven vibrant colors available.