Isotherm pitcher with a long warm function

Have the isotherm pitcher get almost a year ago and use it almost every day in the company. She holds even after 24 the tea still warm, in the first hours really hot! Top! Only the spout I have 1-2 times poured next - hence a point deduction.

Supplement for more than one year: Unfortunately, the spout is over - probably due to the almost daily use :( Will now try to replace the pot as long as 1 additional star deduction..