I don't have better bottles, but from all that I've read they are the equivalent to glass without the weight. Standard plastic water bottles will be fine for short term storage, but will allow oxygen to permeate over time. If you plan on bottle aging, plastic will suffice, butif you plan on bulk aging in the carboy, use glass or the better bottle. Personally, I can get glass cheaper from a local vendor than I can order the better bottle, so I opt with glass. I don't move my carboys around much after I fill them, so weight is not much of a problem.