"Hard to buy water or soft drink without plastic." For decades soft drinks came in glass bottles that were reused or easily recyled. The issue with coffee, apart from the fact that you can't recyle the cup is that it is almost obligotory to have one with you at all times. If yoiu can live with being a producer of that waste then go for it. People shouldn't then complain about the level of rubbish on beaches.
http://www.bbc.co.uk/news/science-environment-39953209
Plastic is recycled and has been for many years. Western nations have major recycling processes. Thailand has a long way to go to catch up.

