It depends on the amount you want to take. If it is microlitres, you can use a micropipette, millilitres, a pipette (a burette would be more accurate), and if greater than that, it is best to use a large graduated cylinder. A graduated cylinder is more inaccurate than a pipette, but at volumes of 500ml for example, it is impractical to use a pipette.
You would use Volume.
mililiters
The answer depends on what characteristic you wish to measure: its mass, length, volume etc.
I would place it in a container full of liquid after measuring the liquid. I would measure the amount of liquid displaced by the object. That amount is equal to the volume of the irregular object if it is fully submerged in the liquid.
I think jam is sold by mass/weight rather than volume, but if you want to measure the volume, a typical jam/jelly jar is less than 1 liter, so use milliliters to measure volume.
You would use a tape measure.
You would use Volume.
mililiters
I would use to measure a volume of a glass liters. Signed Luini, liters are bigger than milliliters and liters are about the volume of a glass.
volume
No, millilitres is a measure of volume not mass. You would use milligrams.
This volume can be measured in millilitres.
liquid volume
you would use centimetres to measure the volume for a slice of bread
The density of a substance is the ratio of its mass to its volume. So, I would measure the mass and volume of a substance to calculate density.
milliliter
millilitres