# Why is the fragrance bottle not full?

> Our bottles are filled by weight not volume    Fragrance oils vary in density That means some are thicker and some are thinner than others When we fill our 

Source: https://support.candlescience.com/en_us/why-is-the-fragrance-bottle-not-full-H1gkmkSOZx

Last updated: 2026-02-26T22:22:36.085Z

All products, including liquid bases and fragrances oils, are filled by weight, not volume.

Fragrance oils vary in density. That means some are thicker and some are thinner than others. When we fill our bottles, they are carefully weighed according to the label. This ensures that you are getting the exact amount of fragrance oil regardless of how thick or thin it is. Some bottles will look fuller than others but once weighed on a scale they will have similar weights.