A simple Jotter that sold for $6.50 was the the pen to have in the 1960s. They're a little more expensive now, but the value remains. Parker ballpoint pens can be a click-top design or a one-piece twist-top design. The Parker ballpoint pen will accept an extremely broad selection of ballpoint refill technologies: standard ballpoint ink, GEL ballpoint ink, Liquid ballpoint ink as well as the Easy Flow technology from Schmidt. Some ballpoint ink choices come in as many as eight colors.