I was lucky enough to be part of this show on coffee cups. The vast majority of which are not recycled due to the PE liner. For years it was considered okay to mix a low percentage in to a batch of cardboard. But over time this has become a real problem. We use 7,000,000 coffee cups a day in the UK. That's 2,500,000,000 a year. The vast majority of which go to landfill. This is a clip from the BBC1 programme that looked at this problem.