What is something that is about or exactly a mililiter?

A drop of water or a tear.

1 gram (cubic centimeter) of water. That's about the size of a small grape.

A milliliter (abbreviated as "mL" or "ml") is a metric unit of volume equal to one-thousandth of a liter. It is used to measure small amounts of liquids or substances. Here are a few examples of things that are approximately or exactly one milliliter:

1. Liquid medicine dosage: Many liquid medications, such as cough syrups or eye drops, come with a dropper or a spoon that measures exactly 1 milliliter to ensure accurate dosing.

2. Small perfume samples: Some perfumes or colognes come in tiny vials or sample bottles, often containing exactly 1 milliliter of fragrance.

3. Blood sample: A small blood sample taken for laboratory testing is typically measured in milliliters. Although the volume may vary depending on the specific test, 1 milliliter is a common unit used for this purpose.

If you need to measure out exactly 1 milliliter, you can use a measuring spoon or a syringe with milliliter markings. Alternatively, many kitchen measuring cups and spoons also have markings for milliliters. It is important to use an appropriate measuring device to ensure accuracy.