I have a joint rolling machine made from a company called Zen. All I have to do is lick the paper, fill the fold with grass and close the lid, and out spits a perfectly rolled joint.

I have to use one as I have Parkinsons in my hands, so I cannot roll a joint due to my hands not being steady. I hate it as people look at you like you're on crack because my hands shake when I hand the cashier money.