I'm a fairly green home-brewer, in both senses, I'm only onto my fourth ever brew. But despite this I have a tip that doesn't seem to be common knowledge. If you buy twist top beer, save the bottles and the caps. They can both be reused again and again, cutting waste and expense. I can now confidently say the caps work as I've started to drink my first brew and have experienced the pleasure of my ales being released under pressure, with a twist of the wrist.