1 gram
1 kilogram
hydrometer
There is really no such thing as a "liquid" unit. The unit of measure is for the VOLUME of something. The best unit for measuring the volume of a human bathtub would be the "Litre".
1 liter
It really depends on what you are coloring in. If you are coloring something small then use a thin brush and if you are coloring something big then use a big brush sometimes in a packet of watercolor pencils you can find a brush.
1 gallon
5 Gallons
Graduated cylinder
If you're looking at a list of choices, I can't help you pick the best choice from the list because you're not sharing it. My estimate, without even seeing the small carton of milk, is 1 cup (8 fluid ounces, 1/2 pint).
64
The best way to find the volume of an irregular solid is to submerge it in a liquid and see how much the liquid rises. You can also use calculus and tripple integrals, but that gets really sticky.
Use a pipette.
The best unit to use to estimate the volume of a pepper shaker would be millilitres and not litres.So in the given example, the closest estimate would be 34 mL and not 34 L.