The meaning of Thermos in dream | Dream interpretation
Emotional container; keeps hot or cold feelings bottled up.
Dreams of a thermos signify that you are attempting to control and/or maintain your energy level.
If you are attempting to keep something hot/warm, you are wanting to keep the passion alive.
If you are trying to keep something chilled, you are trying to keep things cool and calm.
To see or use a thermos in your dream, suggests that you are looking to easily and conveniently satisfy your emotional needs.