First I started with the plastic ones but later the design of the glass one just get me and I coudn`t resist, so I buy three of them and I am using them every day :)
Good quality i recommend
The bottle caps are very good.
It is an amazing concept that I can order extra caps. They obviously don't last as long as the glass bottle and it's great that I can replace them to maximize the longevity of the whole product. The price is also within reason. What I wasn't happy with is the cost of delivery. It was the same price as two extra caps I ordered, so the final cost of getting two caps was half a new bottle.