You can certainly save leftover breadsticks and eat them the next day, although they won't be as good! Wrap in a damp paper towel and microwave until warm. The time will vary depending on your microwave wattage and how many breadsticks you are warming up. It takes about 15 seconds to warm one breadstick in my microwave. You can also place them on a baking sheet and warm them in a 350-degree oven for 5 minutes.