a while back I had asked a friend to save me his empty bottles. He gave them to me today and several of them wear twist-off type. Well I did not have the heart to throw them away so I did a little test on one. I took a fresh beer and poured about 3/4 into one of the twist off bottles and put a cap on it with my capping device,I then shook the bottle and let it sit for a few, Then I popped the top,and it had held the pressure! I don"t see why the twist-off bottles will not work. Does any body use the twist-off bottles in a pinch???