The double-walled teacup 

Questioning:

Might this technique for heat insulation also be used in other things?

Associating:

The air within the double walls blocks the transmission of heat, which is like the space between job and life. Keeping a space between them can prevent the impact on each other. The same is true in relationships with people with very different characters. Keeping a distance between them can be a good approach to avoid conflict.