What is in teaspoon?

"In a teaspoon" is a bit vague! To give you a helpful answer, I need more context.

What are you looking for in a teaspoon?

For example, are you asking about:

* Ingredients? Like "What's in a teaspoon of sugar?" or "What's in a teaspoon of baking soda?"

* Measurements? Like "How many teaspoons are in a tablespoon?"

* Something else entirely?

Please give me more information, and I'll be happy to help!