biodegradably-slow cheap chemical discardable disposable empty environmentally-unfriendly EPS expanded-polystyrene-foam foamed food-plate hazardous-waste inexpensive insulating lightweight low-cost monomer-styrene plastic plate pollutant pollution polystyrene PS substance synthetic-hydrocarbon-polymer toxic-waste unused widely-used blue drops leaf leaf reflection reflection water water drops birds clouds grass lake nature night sky star tree abstract colors fluid liquid paint red yellow background colour colours green orange lavender ground mountains planet texture circles graphic tunnel sun twist