Powder Barrel is an item in the fifth catalog, Miss Nancy's Guide to Stylish Living.
The item is a barrel/keg that can some reason not sit up right. When burned, the item explodes in a colorful explosion. The flames then changes from a range of colors for awhile till the flames changes back to its normal color. It cost 45 coins and takes a minute and 15 seconds to deliver.
A fanciful fiesta of explosive colors!