I used oatmeal or scrambled eggs heat, so I can not comment on the seal, but I doubt that there is a nice soup. Protect the hot morning meal for a few hours, between what is in the house in the morning and the food in the workplace. You can also keep food warm longer, have not tried. The quality feels good, and the number of applications to date, and the longevity of the suspects are higher than costs in the long run.

Thermos E10500 16-Ounce Leak-Proof Travel Mug Features

TherMax double wall vacuum insulation locks in temperature to preserve flavor and freshness
Unbreakable 18/8 stainless steel interior and exterior
Leak-proof 360° drink lid is easy to use and drinkable from any direction
Integrated stainless steel carry loop with carabiner for space saving and instantly accessible attachment to backpacks and other gear
Rubberized shock absorbing base with wide stance for stable footing