If you are looking for a secure mount in a bell that also punches above its weight in terms of sound, the CatEye Flex Tight bell is a great option.  And if you have aero-shaped bars, some silicone mount options just don't work.  Plus, it's got a picture of a kitty on it which we love.

• Aluminum bell with flextight adjustable bracket
• Bell slides along the bracket, allowing to install in any position on the bike
• Can also be mounted on light or computer Flextight brackets
• Fits handlebar from 22 to 32mm
• Bell diameter: 33mm
• Weight: 25g