Powder containers can come in many shapes and sizes, but one of the most common is kegs. Kegs are cylindrical containers made of metal or plastic that are used to store and transport liquids, such as beer, wine, and other beverages. They can also be used to store and transport powder, such as flour, sugar, and other dry ingredients. Kegs are typically sealed with a lid or stopper to prevent leakage and contamination. The four-letter word for these containers is 'kegs'.