A friend gifted this awesome bottle to me & I've purchased several more (15) as 2019 Christmas gifts. It IS glass within glass so you do need to be careful (handle gently, No microwave or dishwasher, don't cap it immediately after filling with boiling water, don't leave the bamboo lid in water etc). It makes me smile when I fill it & see the different tea hues. I often refill (1 or 2 times), depending on the tea, without replacing the teabag. I seriously DO LOVE mine.