A Swirl of Ink
Think about it, instead of having a straight tube ink refill, how about fashioning it as a spiral? The annoying event of running out of ink might be less of a hassle with this new design. Plus, it makes writing a little more unique. It occupies a bit more space so the pen can’t be sleek and slim, yet it holds double the amount of ink. How awesome is that? There’s a reason why our DNA is structured in a double helix. Why can't it be formed the same way for a pen?