And I mean it - just don't throw them out! Look what you can make of them instead - wonderful vases. This one used to be a plastic bottle of corn oil.
I used once more my favorite varnish - the one that makes object to look like they are covered with glass! This one actually makes them feel like that as well. And you can even wash these things in the dishwasher - well if the object itself will not melt in it :)