What you will need is

1. a reusable straw

2. reusable straw cleaner

3. I use a flattened bowl, plate and cup

4. cotton serviette

5. bag to hold all of the clean stuff

6. bag to hold all of the dirty stuff

7. keepy cup.

This is the basic travel kit that I take everywhere. Especially to professional development where food is supplied because they often have plastic plates or serviettes that are disposable.