against a soft brick wall

If these sorts of thing said something more helpful on them, such as "100% biodegradeable but NOT PARTICULARLY QUICK TO PROVE TO BE SO" or "why not assuage your conscience even more by just putting it in one of the handy on-street recycling receptacles located not three hundred metres from this stretch of pavement?" or "this will still become litter even if you discard it onto an ice-covered footway rather than a normal tarmac surface" it might make the more fling-away-heedlessly-inclined purchaser perhaps think a little more. A human corpse is 100% biodegradeable but I expect even the most dedicated litterer would tire of the sight of it after a few years. Still, better coffee than Bucky, though there were ample empty bottles which once held it within skating distance of this.