We’re Not Sure Why These 43 Useful Inventions Aren’t More Common

It might not be life-threatening when a pen dries out on you, but it’s certainly a nuisance. It would just be easier if you knew exactly how much ink is left in a pen before you even pick it up, right? Someone sure thought so, and they went ahead and brought their ideas to life. I’m sure many people out there are thankful for that.

This pen has a gauge of how much ink is left in it, much like driving to your next destination while knowing how much gas is left in your car before you leave. You don’t think you need this until you see it exists. Now, the question is, why hasn’t this pen always been around? It just seems so obvious.