There are many types of tea such as matcha and green tea. Among them, hojicha is a type of tea made by roasting tea leaves such as sencha and bancha.

Hojicha has a relaxing, aromatic tea aroma and a refreshing aftertaste that makes it easy to drink. In fact, theanine, an ingredient in hojicha, is said to relax the brain, and is expected to improve sleep and reduce fatigue upon waking. And when the body is in a relaxed state, the blood vessels dilate and blood flow improves, which warms the body and relieves body chills. This is why hojicha is a highly effective drink for warming up the body, especially during winter seasons.

Hojicha has less bitterness and astringency than black tea or coffee because the caffeine is removed in the high temperature roasting process and the tannin, the bitter component of tea, is reduced. Therefore, it is safe to drink for everyone from babies to the elderly and pregnant women. At home, try Nambu Bunshudo's Iron Teapot which has excellent heat retention properties when making hojicha to keep you warm in the cold winter.

In addition, roasted teas such as hojicha, unlike green tea, do not change color or flavor as much when carried around in a water bottle, since the tea leaves are highly cooked, and thus, less likely to deteriorate and oxidize. Why not bring a cup of hojicha with you when you go out on a cold day with the beautiful wooden New Bottle by Mokuneji that keeps the handle from getting hot even when pouring hot coffee or tea?

Nambu Bunshudo's Iron Teapot
https://www.shokunin.com/en/bunshudo/kyusu.html
Chobundo's Tetsubin
https://www.shokunin.com/en/chobundo/
MokuNeji's New Bottle
https://www.shokunin.com/en/mokuneji/bottle.html

References
https://newtitle.tokyo/tea_tips/hojicha/
https://genten-life.kuipo.co.jp/contents/134
https://www.chaoroshisohonpo.net/blog/483/