A tea flask has a body, a sleeve, a strainer and a lid. The sleeve of the tea flask is mounted sealably on the body, the strainer is mounted in the sleeve, and the lid is mounted sealably on the sleeve to cover the strainer. When using the tea flask, the lid is removed from the sleeve, tealeaves are added to the strainer, and hot water is poured into the body. The lid is mounted on the sleeve of the tea flask. Then, the tea flask is inverted to let the tealeaves steep in the hot water. Seals on the sleeve and lid of the tea flask prevent hot water from leaking out the body. When ready, lid attached to the strainer is removed and tea is poured. This is more hygienic, ensures better taste since the tealeaves do not become stewed and prevent the strainer scalding or burning people.