We just need to ban glass at all water ways. Cans aren't that big of deal. The reality is that people will always leave trash, because people suck. Then, people like me come by and pick it up. What I can't pick up is broken glass, not effectively. If we banned glass at beaches and waterways, we'd just need to put up signs that say "GLASS IS BANNED ON OREGON BEACHES AND WATERWAYS, $500 FINE PER GLASS BOTTLE." Even though the law wouldn't be enforced, just the sign would educate people.