Just about 100 years ago the “vacuum flask” was first manufactured by two German glassblowers. By 1911, machines were making glass fillers for flasks. Many of us know this product today by its brand name, Thermos. This simple, yet revolutionary concept was designed to reduce the heat transfer process.
If you think back to high school science, you may recall that in order to affect the heat transfer process you must slow down conduction, radiation and convection. Thermos products do this