DIY plant pot heater is a Cost of Living hack but comes with safety warnings - Devon Live
DIY Flower Pot Heater | Emergency Heater | Homemade Heater
Emergency Candle Heater: Building a Single Candle Clay Pot Radiator
Best Cheap Heater... simply get a flower pot and a couple bricks and a good size candle and I promise it will keep a vehicle warm enough to tolerate... : r/carcamping
Electricity-free Egloo heater uses only candle power to warm a room