I think the dishwasher is too hot and plastic bottles would be deformed.
However I am washing glass bottles - 20 - in the dishwasher and it is perfect, fast and easy.
I am buying plastic bottles 1 liters from a local supplier in Sofia, Bulgaria - 30 euro cents per bottle. Once the bottle is opened and the cap is ruined do you think I can use it again?
I usually bottle some beer in swing top bottles to save from capping, some beer in normal glass bottles for friends as I don't want to pass my swing tops, and some beer in PET to use it when travel for a weekend or vacation and don't want to cary glass.