
Portable container of hot coals or water, used throughout northern Europe to keep feet warm. Most foot-warmers consist of an inner container made of stoneware or metal with a perforated outer case of wood, wrought iron, copper or brass, and were sometimes wrapped in carpet.
Found on
http://www.antique-marks.com/antique-terms-f.html

Portable container of hot coals or water, used throughout northern Europe to keep feet warm. Most foot-warmers consist of an inner container made of stoneware or metal with a perforated outer case of wood, wrought iron, copper or brass, and were sometimes wrapped in carpet.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

any of various devices, as a small stove, for keeping one's feet warm.
Found on
https://www.infoplease.com/dictionary/foot-warmer
No exact match found.