Similar to automated coffee dispensers, Pop N Go machines fill 42-oz. tubs with hot, plain or buttered popcorn. A clear plexiglass screen lets the buyer watch the 90-second popping process.

Lunch: Tuna salad kit, popcorn, 2 percent chocolate milk. If your machine offers a tuna salad kit, go for that. Tuna provides a plentiful dose of omega-3 fatty acids, powerful healthy fats and ...

Buy an unhealthy snack and these vending machines take away 25 seconds of your life you'll never get back. Healthy fare drops instantly. Research suggests this "time tax" helps us make better choices.