My daughter asked why I always buy the good vanilla extract but measure it with the cap instead of a teaspoon

I told her it's called culinary efficiency.

The measuring spoons are in the dishwasher, the recipe calls for "one teaspoon," and the bottle cap holds roughly one teaspoon if you squint and believe in yourself.

Punchline

Besides, the good vanilla is for flavor, not accuracy. That's why we buy the cheap stuff for science fair volcanoes.