the Light-Year Bottle by Vsauce
Measuring liquid in milliliters or ounces anymoreis boring.
Now you can ride the wave of the future,and measure it in light years! But wait, a light year is a measure of distance, not volume... This bottle holds the amount of water it would take to stretch one lightyear, if all the molecules were laid end-to-end in a single file line.
The amount of water it takes for that monomolecular line to reach 0.1–0.9 of a light year are also marked, as are a few other curiousand unusual volumes.
Available to Curiosity Box subscribers at a member store while supplies last.