A good-quality oil or vinegar makes a nice gift for a host or hostess. There are many varieties to choose from at Crescendo (3030 Granville Street), a European franchise that imports its products in bulk from Italy and France—you can fill your own bottles there. The store also sells gift-sized bottles that you can fill with elixirs such as the low-acidity Star Fig balsamic vinegar, pumpkinseed oil, and orange-infused olive oil. A compact pair of stacking 50-millilitre bottles goes for $12 to $20, depending on what you pour into them. Prepackaged grab-and-go versions are available too.