A coffee cup you can reuse, and bury. I know I'd rather have my children shaded by a tree, than being buzzed by flies from a planet that will soon be one giant, lifeless, rotating landfill, if more people don't come up with ideas like this dude did.
It looks like a new detection device for marijuana may be hitting the streets next year some time. Driving under the influence of marijuana is just as dangerous and just as illegal but it is hard to detect. That may just change.