Joint rolling can be tricky, messy, and for some, a plain futile endeavor leading to wasted rolling papers. But for the less dexterous among us, there's Otto, the world's first smart electronic grinder. Finally, you can DIY your own pre-rolls with the touch of a button. Otto will grind up your weed, with attention paid to consistency, no matter the quality of your cannabis, and pack it into a cone that's ready to smoke. Rolling a joint has never been easier.