Line the bottom of a container with a paper towel and layer bean sprouts in small layers with paper towels in between (like a lasagna). Cover with another paper towel on top but don’t cover with an air-tight lid. Only rinse your bean sprouts in cold water when you are ready to use them. The cold water will help refresh the sprouts. With that said, I definitely recommend buying your bean sprouts within 1 to 2 days at the most before you want to use them to avoid limp and sad-looking sprouts.