The handle of this brush is 9" long, and the end is a 3" diametrer ball made of little sponges. This brush is perfect for cleaning your airpots.
You should not use a bristled brush to clean the inside of an airpot. The bristles will scratch the liner of the airpot. What you want is this sponge brush. The ball shape makes it perfect for cleaning out the entire airpot surface. The sponge ball is vary flexible, and will squeeze into every curve and corner.
This is essential for cleaning airpots. The handle also has a hole for easy hanging near your work area. A must!