Since 1999 under the sole ownership of Cressida Granger, Mathmos widened its product range whilst maintaining and building on the classic Mathmos lava lamp range.
Siden 1999 under Cressida Grangers eneejerskab, har Mathmos udvidet sit produktsortiment samtidig med at have fastholdt og udbygget det klassiske Mathmos udvalg af lavalamper.