Grams vs. Milliliters for Cream Filling

Your question about filling cream, which is ordered by weight (grams), into packaging measured by volume (ml) is a good and valid one.

Grams (g) are a unit of weight, while milliliters (ml) are a unit of volume. The conversion between these two units depends on the density of the substance.

For pure water, the density is approximately 1 gram per milliliter (1 g/ml). Therefore, 30 grams of water will have a volume of approximately 30 milliliters.

However, for cream, which is a mixture of various substances with different densities, the density of the cream is not always equal to 1 g/ml. Some creams may have a density greater than 1 g/ml (e.g., 1.05 g/ml) or less than 1 g/ml (e.g., 0.95 g/ml).

Therefore, 30 grams of cream will not have a volume equal to 30 milliliters unless the cream's density happens to be exactly 1 g/ml.

In summary:

• If the cream's density is greater than 1 g/ml, 30 grams of cream will have a volume less than 30 ml.
• If the cream's density is less than 1 g/ml, 30 grams of cream will have a volume greater than 30 ml.
• If the cream's density is equal to 1 g/ml, 30 grams of cream will have a volume equal to 30 ml.

Recommendation:

For accurate filling of your cream into a 30 ml bottle, you should test measure your cream to find the relationship between its weight and volume, or inquire with the cream manufacturer about the density of that specific cream. Putting 30 grams of cream into a 30 ml bottle might result in the bottle being perfectly full, overflowing, or not completely full, depending on the cream's density.