Drugstore.com takes up to 40% off Crest Teeth Whitening Products. The best deal comes on this Crest 3D White Whitestrips Bundle which drops to $29.99. Check the online coupon box to drop it to $22.99. This is the best price we could find by $9. Add this Blistex Lip Moisturizer to your cart for $2.19 in order to get free shipping. The bundle whitens your teeth in just one treatment, so with 4 treatments included you'll have a year's worth. Only IL, NJ, NY, and WA add tax.