"Thermos" remains a registered trademark in some countries, but it was declared a genericized trademark by court action in the United States in 1963, since it had become colloquially synonymous with vacuum flasks in general.
Thermos, deres varemærke for deres flasker/kander, er stadig et registeret varemærke i nogle lande, men blev deklareret et generisk varemærke i USA i 1963, da det i daglig tale var et synonym med vakuumflasker/kander generelt.