I made tea in the morning and then ended leaving the tumbler in my car all day in 0 degree weather and then all night. When I went to drink the tea the following morning the tea was still warm - I had expected it to be cold and it was still warm. Great product.

I love everything about this product. The size, the basket for stepping, and that it keeps the tea very hot literally all day. I actually have to take the lid off for a few hours before I can drink it. I can't drink it all at once at work, so it's great to drink it throughout the day at the perfect temperature.

Best water bottle. I’ve bought it twice!

I love this steeper! Not only does it have an elegant pattern on the outside but it keeps your tea warm for a full work day.

I have been using this for cold brew tea on the go for a bit over a month, on average 2 fill ups a night. My only reason for 4 stars is that the seal in the lid (bottle to lid seal) does not stay in place and I have to remove it and set it back in almost daily or it will leak, being that it is cold brewed I lay it on its side to keep the leaves in the water after I’ve drank below the infusion basket level. Somehow the seal is twisting in place, other than that it does keep it nice and cold, depending on the loose tea it mostly stays in the basket. Some have little pieces that slip out the fine holes.