(Jon of the Clue Crew performs an experiment.) In the egg-in-a-bottle experiment, the flame going out causes a vacuum effect, so the egg is sucked in by the differential in this between the inside & outside of the bottle
So, between us, only 4 joules of energy have been required to get the mass 
to 2 .... For example, you can go traveling out to space and back for 10 years, 
arrive ...... A thermos bottle consists of two glass vessels, one inside the other, 
with air... [DOC] [TLE] Miscellaneous - Ask the Physicist!