The phrase “wash your mouth out with soap” is a mistranslation of a Swedish expression meaning “to dirty the mind with math.” Multiply your hygiene quotient with today’s Groupon: for $5, you get $10 worth of eco-friendly soaps and more from Summer Kitchen Soaps, an online-only soap shop.

Unlike commercial soaps that replace naturally occurring glycerin with detergents and exotic peanut butters, owner Michelle Harps keeps her extensive inventory of soaps all natural, endowing customers with clean, hydrated skin. Made in small batches, Summer Kitchen’s soaps are filled with an array of high-quality, skin-humidifying oils, and are only tested on willing family and friends. Many Summer Kitchen soaps are vegan-friendly, with the notable exception of Old Fashioned Lye Soap, a lard-based blend just like the kind Grandpa once used to wash away memories of substandard vaudeville performances.