Amazon has a great 30% off Mentos Gum coupon that is applicable on lots of products. This coupon will make the 50 ct bottles as low as $1.84 each!
For example check out this Mentos Pure White Sugar-Free Chewing Gum with Xylitol, Sweet Mint, 50 Piece Bottle (Pack of 6) This product is $11.03 for six 50 ct bottles after Subscribe & Save discount and the 30% off when clipping the coupon on the product page. (That works out to $1.84 per bottle.)
Use the link below to see all the included items.