I only buy one of those plastic bottles every two months, so that's okay for me. The good water comes from the tap, cola or other drinks I buy in glass bottles.
It's not just soda bottles here, it's milk bottles, cream, fruit concentrates... Anything in any kind of plastic container with a screw-on cap.
Actually the soda bottles are the least egregious examples. The milk bottles are terrible: you're 100% guaranteed to spill milk if you don't detach the cap.