I speak with absolutely no experience, as I am still drinking my first batch of kit beer (which is still green, incidentally.
) The Coopers kit that I received for my birthday came with 30 700(ish)mL PET bottles and caps. I found them to be very easy to bottle into, and the caps are simple to put on. They don't break, and I'm under the impression that if I rinse them after use and sterilize them before my next bottling that I should be ok. I'm planning on purchasing another 30 when the batch I have brewing is finished. Are there any real advantages in moving to glass? I'm far from a purist, and as a few have pointed out here, I'm not going to drink straight from the bottle anyway (or at least not until I'm way too drunk to taste the beer.)