Table 1 shows the weight of the analysed bottles measured with
laboratory balance type “Sartorius M-class” balance. The bottles
were collected directly from the market. Before measuring, they
were emptied, washed, dried as well as labels and caps were
removed. All types of investigated bottles and cans contained the
same sort of carbonated drinks having nearly the same CO2 content
(5e7 g*l1).
As can be seen on Table 1, the weight is directly proportional to
the volume, the bigger the bottle volume the smaller the specific
weight. Only the specific weight of PET 2.0 L bottle was measured
slightly heavier than it was expected deducing from the trend
based on the other PET-bottles. This measurement was repeated
with the same outcome, which is conflicting with the hypothesis of
bigger volume lower specific mass.