Read a liquid measuring jug at eye level
A level counter and the right graduation make a bigger difference than trying to pour in one perfect movement.
Set the jug on a flat counter before measuring. Pick a jug whose markings include the amount you need. A 1-liter jug marked every 100 milliliters is awkward for 35 milliliters, even though there is plenty of room inside. Use a smaller graduated vessel or marked measuring spoons for that quantity.
For 300 milliliters of water, pour to just below the 300 line and stop. Lower your eye to the level of the liquid while leaving the jug on the counter. Water curves slightly up at the wall. Read the bottom of that curve against the mark, then add the final splash in small increments. Looking down from above can make the water seem to meet a different line.
Foam can hide the surface. After whisking milk or stock, let the bubbles settle long enough to see where the liquid itself reaches. If the jug has two printed scales, turn the milliliter side toward you before you start, and check that side again before tipping the liquid into your bowl.
