Ben Welter - Thursday, July 25, 2019
U.S. patent application 20190223636 (applicant Probalco BVBA, Kortrijk, Belgium):
"A pouch  filled with phase-change material , wherein the pouch comprises a preformed first wall  and a second wall, wherein the first wall comprises a bowl-shaped part, in which the phase-change material is accommodated, and a peripheral part, wherein the second wall is attached to the peripheral part of the first wall, wherein a high vacuum prevails in the pouch, and wherein the pouch is intended for placing against a wall to be heated or cooled. ... The present invention further relates to crockery provided with a pouch filled with phase-change material."