Crest 44-Count 3D White Teeth Whitening Kit

This teeth whitening kit removes tough set-in stains, whitens teeth up to 20 levels in 22 days, and uses an enamel-safe whitening ingredient. It features Advanced Seal Technology for a comfortable, no-slip grip. The price drops from $45.99 to $29.99. Shipping is free for prime members or on orders over $35.