Here’s where it gets wild. A liquid measuring cup is different from a dry one. They are not the same tool.
A liquid cup has a spout and a lip above the measurement line. A dry cup is a flat scoop. If you use a liquid cup for flour, you’ll compress it—ending up with more than 2/3 cup.
This is why bakers get into arguments. The correct way: for flour or sugar, scoop and level with a knife. For milk or oil, pour and look at eye level.
Quirky Uses for 2/3 Cup You Never Thought Of
This isn’t just for baking. Use 2/3 cup of coffee grounds for a bold morning brew.
Use it to measure out exactly enough popcorn kernels for a movie night—not too few, not a bag explosion. It’s the perfect snack zone.
How Many 2/3 Cups Are In A Cup at Jacqueline Anderson blog
Or try it with cat food. Your feline friend will think you’re a culinary genius. (Spoiler: they won’t care, but you’ll feel fancy.)