Electric beverage warmers; Electric beverage warmers in the nature of cups, mugs; Electric cup heaters; Electric food warmers in the nature of dishes, portable household appliances, bowls, trays,; Electric hot plates; Electrically-heated mugs; Heating installations; Portable thermal self-heating pouch for the purpose of heating food; Portable thermoelectric cooling and heating unit for food and beverages; USB-powered cup heaters