Picture is a coffee cup (the modern 'starbucks style' ????)
Otherwise its coffee beans, which BTW you can chew by themselves to get your fix if you are desperate.
--- amazing the stuff you can find in 10 seconds on the internet these days if you know how - excerp :
the "vacuum flask" was first manufactured for commercial use in 1904, when two German glass blowers formed Thermos GmbH. They held a contest to name the "vacuum flask" and a resident of Munich submitted "Thermos", which came from the Greek word "Therme" meaning "heat".
In 1907, Thermos GmbH sold the Thermos trademark rights to three independent companies: