I'm a big fan of crispy cheese "crackers" that I make by cooking cheese in the microwave. Recently, I've discovered a commercial equivalent: Just the Cheese Bars, Crunchy Baked Low Carb Snack Bars, 100% Natural Cheese, High Protein and Gluten Free. These are great! A package is about the size of a candy bar and weighs 0.8 oz. They are very convenient for travelling, especially on airplanes.

I've tried the aged cheddar and grilled cheese flavors. I like them both. There is also a jalapeno flavor, which I will eventually try.