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 Jewish immigrant to the United States from the region formerly including Russia/Hungary/Poland "Galitzianer" Region, who invented his toiletry case in 1919. During the Depression, Doppelt hired his Nephew-Jerome Harris, who worked his way up from cleaning toilets, to rebuilding the Singer Sewing Machines, for sewing the leather goods, through Chief Designer, Director of Sales, later Director of Charles Doppelt, CEO, when the company was sold to Samsonite. Harris is largely credited with inventing the hard sided mens attache case, combination locks for use in brief & attache cases, and many other designs of cases, clutch purses, etc., during his 48 year tenure at Doppelt. His reason for selling the business, was due to the knowledge that manufacturing was leaving the US, due to labor & raw material manufacturing costs/regulations, ending a family legacy. 
The trademark Dopp was filed by Samsonite for registration at the U.S. Trademark Office on Mar. 24, 1980. The class of goods for which it was applicable was “toilet cases sold empty, briefcases, briefcase type portfolios, sample and catalog cases sold empty, luggage identification tags, and traveling bags”. An additional filing for the trademark Dopp Kit was made on April 3, 1980 for the class of goods “travel kits, sold empty”. In both of those applications Samsonite stated that the trademarks were first used in July 1936. The registration for “Dopp Kit” was cancelled in March of 2003 when no one filed a required (Section 8) Declaration of Continued Use, but the required declarations have been filed for “Dopp”. The marks were assigned to DHP Limited Partnership (dba Buxton) in 1990; the current owner of the “Dopp” trademark is listed as Buxton Acquisition Co., LLC, of Chicopee, Massachusetts.
Dopp kits were once a common gift given to adolescent males as they ascended from boyhood to adulthood.
In the British Isles the item is known as a "sponge bag".
- Source: Catalogue from The Guildhall, Davis + Henderson, Markham, Ontario, Canada.
- http://tsdr.uspto.gov Registration number 1193631
- "Trademark Application "DOPP KIT" (serial #73256578), Registration number 1197268". United States Patent and Trademark Office (USPTO). Retrieved 20 February 2014.