Swiss Miss is a name brand for cocoa powder and pudding products sold by American food company ConAgra Brands.
They have multiple products including different lines of Hot Cocoa. Their hot cocoa is available in regular and "no sugar added", with or without small marshmallows, Great Start Cocoa (fortified with 15 essential vitamins and minerals) and Pick-Me-Up (with 67 mg of caffeine/packet).
History
In the 1950s, the company sold its original hot cocoa product as an onboard beverage to airline passengers. Only after the drink became popular did it sell products in grocery stores.
References
Swiss Miss Wikipedia(Text) CC BY-SA