I guess it would be a tip for anyone caring for children. I discovered it in a time of desperation and it is forever burned into my memory as one of my most brilliant moments. The only audience was my four children and only one of them noticed; not Pati grinning in the stroller or Alec worrying about getting to push the elevator button once we got back to the elevator or Anne touching everything in the bathroom she shouldn't - just Jan, sick as a dog.
If you are ever in a public place and need something portable and disposable to catch any kind of mess, just look under the garbage bag in the rest room. They keep whole rolls of extra garbage bags. Tear one off the roll and you have a portable throw up bowl or whatever. I had to do it twice from two different bathrooms as we were caught in a large office building with an appointment to keep and Jan was suddenly very nauseated. And I knew exactly what she had had for breakfast. Alot.