Thermos flask. Thermos flasks keep hot drinks warm and cold drinks cool. They comprise an outer container and an inner container separated by a vacuum. The vacuum reduces heat transfer from the interior to the exterior of the flask. Modern types are usually made from stainless steel and plastics | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Molloy, Cordelia |
Taille de l’image : | 2304 px × 3456 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |