TiV stands for 'Thermally Induced Vacuum'. Used in all Lifeventure mugs and flasks, it's an efficient method of insulating containers to keep contents hot or cold. There is an airtight chamber between the core of the flask and the wall, from which air has been evacuated. With fewer air molecules in the vacuum cavity, it takes longer for heat to escape from the contents as the process of heat transfer is slowed.
