More to explore:
made from #plasticbottle bottoms
Bottom of soda bottles. Surprisingly pretty as flowers.-Could water bottles work? Because I wouldn't have any soda.
Recycled Plastic Bottle Art Flowers - just cut off the bottom of two litre pop bottles to get your flowers! Tie them up with fish line
reuse plastic bottles. Flowers (or snowflakes!) from plastic soda bottle bottoms.