Just like every other mint tablet out there, such as Penguin and Starbucks brands with the exception of looking like a nipple instead of a cyanide capsule.

According to their packaging:
Certain foods and beverages contain acids that may damage tooth enamel. Consuming coffee, soft drinks, juices, tomatoes, and many other foods high in acid content, then followed by a sugar based breath mint, over time can result in tooth decay problems.
MYNTZ!® are sugar free and acid neutralizing to help maintain good oral hygiene.

Plus they're shaped like nipples

While Myntz do not contain caffeine or sugar, they leave the taster with minty fresh breath and a cool, crisp feeling in their mouths and sinuses. Pretty good for a treat that is shaped like a nipple. Everyone around here calls them nipple mints for some reason.