This is a little trick to figure out half volume on an **oddly-shaped** drink bottle or container.

This may be useful if you are not at home and can’t measure the volume of a drink!

Suppose your need some sugar and the bottle has 30 grams, like the tea bottle below. You may want only 15 grams. Where on this bottle is 15 grams?

Here are two easy ways to find **half**:

(For this to work, the bottle has to be full before you start ).

Drink a little bit, put the cap back on, put your thumb on the liquid level and turn it completely upside down (without moving your thumb!). Is the liquid level above your thumb? If so, drink just a little bit more, put your thumb on the new liquid level, and try it again. At the point when the liquid level is at your thumb - when the bottle is both rightside-up and upside-down - that’s half!

The above way works on any shaped bottle. Another way of doing it that works for any bottle that has a vertical axis of symmetry (most bottles have that) is to do the above steps but instead of using your thumb and turning it upside-down, put the bottle on its side. When the liquid level is at the center of the base, that’s half:

So that’s how to find half volume of an oddly-shaped drink container.

Here are some oddly shaped drink containers.

(Just kidding with the beer bottle, I’d never only drink

*half*of one of those. )

There is a way to figure out *any* volume (not just half) without using a measuring cup, but it requires a ruler and some math, and I don’t want to torment anyone on a Monday. I can save that description for another day if you want to hear it.