Good Helper for Cleaning Do you have trouble cleaning your cup thoroughly by hand? A small tool can help you clean your cup easily. The large sponge on the glass bottle brush effectively removes stains from the bottom and walls of the cup. The soft sponge won't scratch the cup interior, reducing daily cleaning effort while keeping your cup consistently clean. High-Quality Sponge Brush The bottle cleaning brush features a comfortable plastic handle and soft sponge material. The handle is smooth, sturdy, and easy to grip. Small holes at the bottom allow for convenient wall hanging after use. The sponge is safe, non-toxic, and has dense pores that generate rich foam, making cleaning more efficient. Practical Design The brush handle has a retractable design. Extended size is 29 x 5.5 cm, and retracted size is 34.3 x 5.5 cm. This allows you to adjust the handle length based on the container depth for optimal cleaning reach. The locking mechanism securely holds the selected length, preventing accidental retraction during use. Dense Sponge The soft sponge will not damage or scratch your cups. It has excellent elasticity, making it effective for cleaning wide-mouth bottles and glasses. Its high water absorption helps create abundant foam for deeper cleaning. The sponge head remains firmly attached even with extended use, ensuring reliable performance. Multifunctional Application The sponge head measures 8.5 x 5.5 cm, suitable for cleaning most wide-mouth containers such as cups, teapots, wine glasses, glass bottles, kettles, stemware, vacuum flasks, and coffee makers. This adjustable bottle brush is not recommended for containers with very narrow openings. Please measure your containers before use to ensure compatibility.