During summer, the best products are the seasonal ones related to travel, holidays, hot weather, outdoor activities, and leisure. A great idea is offering summer apparel like swimsuits, hats, tote bags, sunglasses, and more. Consider that you don't have to change your current offer drastically; instead, try to find summer alternatives that might be refreshing for your customers. For example, if you own a bakery, consider creating a summer edition package with refreshing options like ice cream cakes and sandwiches filled with fresh and yummy veggies. Also, you can include fresh fruits or add beautiful summer decorations to make your desserts more in tune with the season. As you can see, you can always add a plus to the products you already sell without creating something that has nothing to do with your business.