This may be the least practical of the inventions, but definitely one of the coolest. Tired of hand-etching the Batman symbol into everything you own? The Batman Branding Iron aims to solve that. This 3D-printed steel branding iron snaps right onto any standard Bic lighter. Simply hold the flame to the metal end for about 1.5-minutes, and you’ll be ready to make it look like Batman was there. Continue reading for more simple, yet practical, inventions that make life easier.