Amazon's Spring Sale is offering discounts on essential personal care and wellness items, including the most expensive electric toothbrushes and pain relievers. The Waterpik Aquarius, the gold standard of water flossers, is 40% off on Amazon and has over 116,000 5-star ratings on Amazon. The deal also includes a whitening mouthwash and strips made with natural coconut oil. The Coway air purifier is designed to purify rooms of up to 867 square feet and has a timer feature.