I have a Victorian sugar castor, also called a muffineer. It is like a salt shaker on steroids. It is what one used in the past to sprinkle sugar on food. And the sugar that is used in such a utensil is "caster sugar". I, however, use mine to sprinkle cinnamon on my oatmeal in the morning. A lot of those for sale on ebay are british or american.
Oregon. It probably depends on your background how common they are. Mine is the first in the family. Check ebay. They list them as sugar shakers, muffineers and sugar castors. And my local grocery sells packages of sugar labeled "castor sugar". It is a great store and has about 5 different types of sugar. Of course, this is Portland where ingredients are almost a religion.