This idea came to me one morning while I was making a cup of tea.

I though about how Lipton is now advertising the new fancy tea bags made of an open weave material that is heat sealed into a pyramid.  The technology has been around for a number of years in the high-end tea business but now it has gone mainstream.  There is a machinery manufacturer somewhere who just bought a new car.
So then I thought what else could improve the making of a cup of tea?  And I saw the dish that Nurit uses to put her finished (infused?) bag into and I had an epiphany.  What about designing a material that swells up and closes the bag after a few minutes in hot water.  It could be called an “infusion control bag”?  Is it possible? It could make the same strength cup of tea every time and no mess.

The tea marketers who were differentiating themselves with the pyramid bag will now be looking for a new idea so the time is right.