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Walgreens has Buy 2, Get 1 Free on Select Crest 3D White Toothpaste. Add 6 to cart and clip all coupons for $ 11.18 in savings. Log into or Register for a Balance Rewards Membership (free to join [walgreens.com]) to clip all available coupons on each of the items below. Choose free ship to store pickup.

NOTE: I had to use desktop/laptop to get all coupons to apply

Example options (you can only order in quantities below. You may have to refresh cart after clipping coupons for prices to display. It may show $ 0.50 or so higher, but once you select store pickup in checkout it will drop back down) :