To clean a sipper bottle for girls effectively, start by disassembling all parts, including the lid and straw. Wash each piece with warm soapy water, using a bottle brush to reach narrow areas. Rinse thoroughly and allow all parts to air dry completely to prevent mold and bacteria growth. For deep cleaning, soak in a vinegar-water solution or use a mild baking soda mixture. Avoid harsh chemicals that could damage the bottle or affect taste. For high-quality, durable sipper bottles for girls, check out Stridex Clothing, offering safe and stylish bottles designed for everyday use and easy maintenance.