Randy-Loo

Randy-Loo was a Muggle company that presumably sold or rented portable toilets, or "porta potties". Many of its toilets were located on Shaftesbury Avenue in London, England. Its telephone number was advertised as 13004-21836.

Etymology
"Loo" is a British slang word for toilet.

Appearances

 * Harry Potter and the Deathly Hallows: Part 1 (video game)