For our ocean’s sake, we can’t keep kicking the can – or bottle – down the road. We call on the UK government to speed up this law and to follow Wales’s ambition to include plastic, metal and glass.”
The "ocean's sake"?
Glass doesn't float. If it winds up in the ocean, one just gets beach glass.
In fact, we had a place up in California where a beach was being directly used as a dump once. The only remaining stuff, after the metal had rusted away and such, was glass, and it all got turned into beach glass. The state went from trying to stop people from dumping things on the beach to banning people hauling away the beach glass; it had become a tourist attraction.
https://en.wikipedia.org/wiki/Glass_Beach_%28Fort_Bragg%2C_California%29