The Mass of a Bottle calculator computes the mass based on the dimensions of the bottle and the mean density of the material.
INSTRUCTIONS: Choose the length units you wish (e.g. centimeters or inches) and enter the following:
Mass of the Bottle (M): The calculator returns the mass in grams. However, this can be automatically converted to compatible units via the pulldown menu.
The formula for the mass of a bottle shaped object is the volume of the bottle times the density of the material. Assuming normal gravity, this also provides the weight. Geometrically, a bottle shaped object is the combination of right circular cone with a frustum defined by base radius (a) and top radius (b) and height (h_{2}) in between and a cylinder of radius (b) and height (h_{1}). The volume is calculated and then multiplied by a mean density (mD) to provide the mass of the shape. See diagram. KEY WORDS: container
Common Mean Densities 
Natural
Food
Industrial
Fuels

Mean density is the average amount of mass within a volume for a substance. Note, volume of a material is often highly subject to the temperatures, since materials expand as they warm. For that reason, mean densities of substances are often cited with a set of nominal conditions such as temperature and barometric pressure.
The formula for mean density is:
μD = V / m
where:
Mean density is also often indicated as the Greek symbol rho (ρ).
The mean density of fluids can be useful since fluids (liquids and gases) conform to the shape of their containers. This is why it is possible to use the mean density of a substance and the dimensions of its container to estimate the weight/mass of the substance in the container.