While, yes, we understand that colds and flus are caused by viruses, not bacteria, it still makes us feel better about life to use purifying products when we're feeling under the weather, and this moisturizing hand soap with tea-tree oil totally delivers (without drying out our sad, cold winter hands). We'll be stocking extra bottles this season, along with its perfect mate, the Cold & Flu Shower Gel, which includes sinus-clearing eucalyptus (and circulation-improving fennel extract for when you get the chills).