A Dopp kit is a small toilet bag, made of leather, vinyl, or cloth, that is used for storing men's grooming tools for travel. Common items kept in a Dopp kit are deodorant, a razor, shaving cream, comb, shampoo, nail clippers, scissors, toothbrush, toothpaste, and cologne. The name derives from early 20th century leather craftsman Charles Doppelt, a German immigrant to the United States, who invented his toiletry case in 1919.
Dopp kits were once a common gift given to adolescent males as they ascended from boyhood to adulthood.
The U.S. Patent and Trademark Office lists the trademark for "DOPP KIT" as canceled. It is still held by Buxton. Buxton also owns a related registration for "DOPP", Registration No. 1,193,631. In addition to other goods the mark "DOPP" is used on toiletry bags.
In the British Isles the item is known as a "sponge bag".