its tinfoil and Styrofoam
Keep in warmth, it slows down the transfer between the 2 different temp. can also keep in the cool air.
Thermos jugs are just very good insulators. Just like your house, they're designed to keep one or the other of extreme temperatures away from the inside of the jug ...and vice versa. FriPilot
because cool bananas are cool
Ceramics are good insulators. They keep heat well because they have a lot of air trapped in them.
Something ending with x or ex is now cool (for example, coolx). Try to keep it short and simple. Good luck!
Sheet of newspaper are good insulators.
Because it is a good conductor and if you are a good conductor you are a poor insulator. Insulators, keep heat in and, conductors let heat pass through them easily.
fan
fan
insulators or insulation does not permit electricity to flow through you.
they keep your house warm
A vacuum is a good insulator so a "thermos" bottle will keep liquids 8or solids) cool for a while.