This thing is great for hot beverages as long as you dont steep your tea in the thermos itself and then cap it (I did this and the tea went sour before it was at a drinkable temp)
For cold beverages this thing is phenomenal, I had a drink with ice one night in spring drank all the beverage and had some ice left over with about an 1/8 inch of water from it melting and in the morning(9-10 hours later) I still had ice and just over a 1/4 inch of water.
10/10 would recommend to a friend who listens well or coffee with cream drinkers
8/10 for a coffee drinker/ tea drinker that likes HOT beverages but sips them
6/10 for a "run out the door and Steep’ person (just too hot for too long)