This is a great deal!
Buy any Bayer Glucose Contour Meter in the month of April at Walgreens and you'll get a coupon for a free Crest toothpaste on your next purchase at Walgreens.
Use the $30/1 coupon from 3/1 or 3/22 inserts (coupon will have to be adjusted down to the price the monitor is at) to get the monitor for free, plus you'll get the coupon for the free toothpaste.
And, if you have four Bayer coupons, you can get four free Crest products and then submit your rebates for the $5 April EasySaver when you buy four Crest products.
There's also a rebate form floating around for a coupon for a free tube of Crest Pro-Health