Newbie member. How about Playtex baby bottle plastic liners? Haven't looked at this stuff in years, but assume its still around. Also Colin Fletcher in his book "The New Complete Walker" advocated a plastic baby bottle as a small(250 cc ?), tough, pocket canteen-no good for a pocket kit, of course, but maybe useful for a larger kit. Just a couple of thoughts. Might check out baby bottles when I go shopping tomorrow. <br><br>