DealPulp, another daily deal site, is offering a $25 code at LetsGoGreen.biz for $8. If you're new to DealPulp, you will get a $5 referral for signing up, which will make your voucher only $3 for the $25 code!!!
I looked around LetsGoGreen.biz, which sells Eco-Friendly home, office, and business products and found these Camelbak bottles (which are my absolute fav--especially these stainless steel bottles)!
After taking into consideration the shipping and the price of the voucher, you can get this Stainless Steel Camelbak bottle for only $14.28 SHIPPED! (Shipping for me was $8.40, so this could vary a bit) These are regularly $24 each.
That's a cheaper than I could ever find . . . even on Amazon! The same one at Amazon is $19.48 (which includes free shipping with Prime).