"There's no need for people to do a lot of things, but we don't ban them."
Agreed. I was responding to the question about MPs wanting to cure a problem that, in my view, is not a problem at all. Their stock answer (to almost everything) is to tax it. I'm not particularly fussed about takeaway coffee cups being used. So long as they are disposed of neatly and not just chucked in the road they can simply be scooped up and dumped in a landfill site. There are plenty of holes in the ground, disused mines and places around the coast that need reclaiming from the sea.
Putting 5p tax on the cup will not go anyway to cure the problem. Anybody willing to pay two to three quid for a cup of coffee will not stop drinking it because it goes up by 5p. If takeaway coffee is that much of a problem and since it's unnecessary then simply ban it. Personally I'd far rather see McDonald's burger wrappers taxed because people who drink coffee seem, in the main, to dispose of their cups thoughtfully whereas those who eat burgers seem to chuck their wrappers wherever they happen to finish (or tire of) their "meal".