Should get no stars
Tried to use this flask for tea, with milk, to take to work. It smelt disgusting, was lukewarm and undrinkable by lunch time. On emptying the flask when I got home, the tea came out with lumps in it. Thinking that maybe the milk had been off I tried again the next day with a fresh bottle of milk. Same result. Cleaned the flask with bicarb/vinegar and rinsed thoroughly over the weekend. Tried again Monday - same again. I’ll be taking it back.