Safe Portable Heater

portable
of a motor designed to be attached to the outside of a boat's hull; "a portable outboard motor"
A small transportable building used as a classroom
a small light typewriter; usually with a case in which it can be carried
A version of something, such as a small lightweight television or computer, that can be easily carried
easily or conveniently transported; "a portable television set"

heater
device that heats water or supplies warmth to a room
A fastball
A person or thing that heats, in particular a device for warming the air or water
A conductor used for indirect heating of the cathode of a thermionic tube
fastball: (baseball) a pitch thrown with maximum velocity; "he swung late on the fastball"; "he showed batters nothing but smoke"
A heater is object that emits heat or causes another body to achieve a higher temperature. In a household or domestic setting, heaters are usually appliances whose purpose is to generate heating (i.e. warmth). Heaters exists for all states of matter, including solids, liquids and gases.

safe
A condom
free from danger or the risk of harm; "a safe trip"; "you will be safe here"; "a safe place"; "a safe bet"
a ventilated or refrigerated cupboard for securing provisions from pests
A strong fireproof cabinet with a complex lock, used for the storage of valuables
strongbox where valuables can be safely kept