This online store, which launched in February, sells a wide variety of travel-size lotions and potions from luxury brands such as Weleda, Ahava, and The Art of Shaving. 3floz.com caters to harried business travelers by offering same-day delivery in New York City and shipping to hotels worldwide. Customers also can e-mail a flight confirmation that proves they are leaving within 72 hours and have orders delivered overnight at standard shipping prices.