A simple guide to use these brushes to clean:

1. the large brush: water bottles (narrow opening brush like S'well bottle), vases, mason jars...

2. the medium brush: baby milk bottles or pacifiers, beer bottles, soy sauce bottles...

3. the small brush: kettles, cans, jam jars...

4. the cotton straw brush: glass/steel straws or delicate surface surfaces...

5. the sisal straw brush: bamboo straws or surfaces with tough stains...