wrote in message
ups.com

I hadn't flown in 7 yrs until last week when i went on a vacation. My
question is that the plane i flew in had the tips of its wings bent or
inverted upward. I had never seen this before. Someone told me that
this was done to save fuel, but is that it?

From http://oea.larc.nasa.gov/PAIS/Concept2Reality/winglets.html:

"The resulting reduction in aircraft drag for a properly designed winglet
configuration can be extremely significant in terms of fuel consumption and
range."

--
John T
http://sage1solutions.com/blogs/TknoFlyer
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