To use this Condor water bottle pouch, simply slide your 750 mL (24 Oz.) water bottle into the pouch. It's designed to fit snugly and keep your bottle secure. When it comes to maintenance, you can use a mild soap and water to clean it if it gets dirty. Just make sure to let it dry completely before using it again. Also, avoid over - stuffing the pouch with other items as it's specifically made for a 750 mL (24 Oz.) bottle. Keep it away from sharp objects to prevent any tears or damage.