> water caps before but I remember someone saying that beer bottle > caps produce > about 100 pf each. Closer to 700pf each. Assuming standard '12 oz' bottles in the US. so 20 of them would be 0.014 Michael Baumann Coiler, Homebrewer, Nerd...mycroft-at-access1-dot-net http://www.access1-dot-net/mycroft