1. Material: This cup cleaner brush set is made of ABS PP PET silica gel material and is durable. Rotating brush for cleaning design can easily handle temperatures up to 80 degrees Celsius, ensuring longterm stable performance and reliable cleaning effects. Whether it's daily cleaning or dealing with stubborn stains, this sponge bottle brush can meet all your needs. 2. 5in1 DesignThis multifunctional cleaning brush consists of 4 parts. 1. Ushaped brush fits the cup mouth to clean stubborn stains around the cup mouth. 2. Gap brush Clean the narrow grooves on the inner wall of the cup lid. 3. Corner brush with hard bristles Remove dirt in the corner grooves of the container. 4. Cleaning sponge Clean the inner wall of the cup lid. Experience easy cleaning with our cup lid cleaning brush set. 3. Easy to cleanThis cleaning brush for water bottles includes 4 specially designed brush heads. A cup tip brush for handling stubborn stains, a gap brush for cleaning narrow grooves, and a corner brush with bristles that can thoroughly remove dirt in tight corners. Cup cleaning brush brings a complete change to your cleaning habits, keeping your home clean. 4. Spacesaving designThis bottle cleaner brush set has a 180degree rotatable and replaceable design, enabling quick replacement and simplifying the cleaning process. Each bottle cleaning brush has a hanging hole for easy storage, so you can keep your space organized and tidy. This 3in1 cleaning brush has a userfriendly design that maximizes comfort.