Today -- Thurs., Aug. 12, 2010 -- all Sigg reusable water bottles are 50% off as a part of a Whole Foods back-to-school sale
. There's no telling how long supplies will last, so head to Whole Foods early if you really want one at a steep discount. Sigg stainless steel water bottles go for $11-$25 online, so aim to get one for $5-$15. While you are there, make sure to use these Whole Foods coupons
on other items. Caveats: Valid at participating Whole Foods locations only.