Mini Cup Stain Remover Tool

I'm looking for a mini cup cleaning tool specifically designed to remove stains from glass, plastic, and ceramic cups. The tool should feature a rotating scrubber for efficient cleaning.

Key Requirements:
- Designed for glass, plastic, and ceramic cups
- Effective stain removal capability
- Rotating scrubber mechanism

Ideal Skills and Experience:
- Experience in designing cleaning tools
- Knowledge of materials suitable for different cup types
- Mechanical engineering skills for the rotating mechanism

Please provide samples of previous work.