The acceleration due to gravity on the moon is about 5.4 ft/s2 . if your weight is 150 lbf on the earth:
what is your mass on the moon, in slugs.

4.662 slugs

Explanation:

Your mass on the moon should always be the same as any planet you are on (due to law of mass conservation), only your weight be different as gravitational acceleration is different on each planet.

If you weight 150 lbf on Earth, and gravitational acceleration on Earth is 32.174 ft/s2. The your mass on Earth is

m = W / g = 150 / 32.174 = 4.662 slugs

which is also your mass on the moon.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask