On Sat, 21 Mar 2009 22:28:21 -0700 (PDT), engineman
wrote:

I have a plastic bottle that once held Lipton's green tea.
when I looked at the threads on the bottle it looks like they consist
of segments.
The cap has similar threads.
I'm wondering what the reason for these strange threads?
Engineman

http://www.photoworks.com/photo-shar...&toh=&svr=web5
To safely release pressure?
Gerry :-)}
London, Canada