Patented single cup brewers that sit on top of your coffee cup/mug and brew directly into it have been around since the late 1800s, at least that is as early as we could find in the patent searches. The Aeropress® only brews ground coffee or tea, you could probably use a coffee a filter pod. With natural product design improvements and increased functionality the CajunCoffeePress is the next step in the evolution of coffee brewers!
The chamber of the CajunCoffeePress is wider, not only is it more comfortable on your hand it gives you mechanical advantage, and allows for the ability to brew a full travel size mug, the plungers inner diameter is wide enough for you to store several K-cups® in it for travel, the diameter necks down for an increased pressure at the filter cap requiring less force to push the plunger down. The CajunCoffeePress is designed specifically to be able to brew inverted. With the wider chamber it provides a more stable base, there is a double seal on the plunger so there are no messy leaks or potential seal problems while inverted and the filter cap has a raised lip to catch that creamy extraction. (for the people who prefer to brew inverted).
Then there is the universal cap, which opens up a world of possibilities with all of the flavored single cup brewing pods on the market. You are not stuck with just one brand, it's up to you which one you like. This is a great feature if you are traveling and can't find the single serve cups that you like.
The versatility gives you options!