Buy them in the grocery store and drink what's inside. I'm digging on the Guiness bottles right now with the shrink plastic labels. Drink, rinse and run a blade down the side to peel the label and you're ready for sanitizer at bottling day. Plus the bottles are very cool.
If you drink three beers a day for a month, you will have nearly 100 bottles. More than you would need to bottle two, 5 gallon batches.