King of the Hill's I've ever seen!

I have had several Thermometers. Cheap, expensive ... but this one is really the best.
Pro:
+ It is dense. Sealing bomb !!
+ Man kan it drink without spilling, because we not only have an opening.
+ It keeps really long hot as promised.
+ It is very easy to clean because you can take it almost completely collapse or drift apart.
+ Looks optically very good and high quality.

Contraindications:
- Open the first time is an ordeal! Without my friend I would have been screwed.
- Can sometimes be, no longer open to filling a hot drink.

I've learned that, if one fills a hot drink, press the button after a couple of minutes time. Then it can also open well later.