Who wouldn't want to discover this under the tree? Dr. Barbara Sturm Serum Discovery Set ($325) includes four travel-size versions of her famed serums. There's one with hyaluronic acid for supreme hydration (as that molecule can hold 1,000 times its weight in water), along with the self-explanatory Brightening, Calming, and Super Anti-Ageing serums. Perhaps next year you can treat that same person to a full-size bottle of their favourite one?