Ballpoint pens are the most widely used type of pen due to their reliability & price. They generally contain an oil based ink that writes reasonably smoothly giving a nice strong line with colours that stand out. Most ballpoint pens cannot write upside down however there are a couple of exceptions The Uni-ball Power Tank & Pilot Down Force have a pressurised refill.
We have a huge range of ballpoint pens from all the major brands. To make it easier to find your perfect ballpoint pen they can be filtered in the left hand menu bar by brand, ink colour, tip size, price, if refillable & mechanism.