I just acquired a Schwinn water bottle that is lined with silvered-glass on the inside like a thermos bottle. I was unaware that thermos bottles were also used for bike water bottles? The bottle has no sip-valve but the top flips open. Marked made in Taiwan and Schwinn script in red over white hard-plastic body. I hesitate to use this for more than display purposes as I have dropped and broken a few thermos(es) this way.
Jack Romans
Sacramento, CA