What product uses the advertising tagline 'Melts in your mouth, not in your hands'?

The advertising tagline "Melts in your mouth, not in your hands" is famously associated with M&M's chocolate candies. This clever slogan highlights the product's unique design feature: a hard candy shell that encases the chocolate center, preventing it from melting when held. This innovative coating allows the chocolate to remain intact at room temperature, making M&M's a convenient, mess-free treat.

The concept for M&M's originated during the Spanish Civil War when Forrest Mars Sr. observed soldiers eating chocolate pellets covered in a hard sugar shell, which prevented them from melting in warm climates. Inspired by this, he developed his own version for the American market. M&M's were first introduced in 1941 and were initially supplied to the U.S. military during World War II as a ration. The protective shell was ideal for soldiers in various climates, allowing them to enjoy chocolate without the mess.

The iconic tagline itself was introduced to the public in 1949, emphasizing this key benefit to consumers. The science behind it is straightforward: the sugar coating has a higher melting point than chocolate and acts as an insulator, protecting the inner chocolate from the warmth of a hand. Once the candy is placed in the mouth, saliva begins to dissolve the sugar shell, and the chocolate, with its lower melting point, then melts due to the body's internal temperature. This distinctive characteristic made the tagline a highly successful and memorable advertising phrase for decades, setting M&M's apart from other chocolate candies.