21 items in this article 3 items on sale! Photo-Illustration: The Strategist; Photos: Retailers It happens every holiday season: You realize you need to buy a gift for your sister-in-law or Secret Santa recipient or friend’s parent who’s hosting, but you know absolutely nothing about them. You don’t know their T-shirt size, what their home looks like, whether they have a gluten sensitivity or a nut allergy, whether they drink alcohol, what fragrances they enjoy (or whether they hate things with