Is it true that you can tan more under water?

Is it true that you can boil water in a plastic water bottle?

• Water boils at 212 Fahrenheit and plastic has roughly a melting point of 300 degrees Fahrenheit yet a camp fire is anywhere from 1652 degrees Fahrenheit to 1832 degrees Fahrenheit. I saw it on Man Woman Wild. They hung a plastic bottle full of dirty water to boil. He explained that as long as the plastic bottle has water it wouldn't melt. To me it seemed that he was saying that the plastic is transferring its thermal energy to the water and not allowing it to reach its melting point and thus the water boils without melting. But it doesn't make sense that the plastic wouldn't melt after the water started boiling, because the energy of the h2o atoms doesn't rise anymore when its boiling, not until it has become a gas and then the energy can be raise further. So after the water starts boiling, why doesn't the plastic melt? So if this is true. Could someone explain how it works? Was my assumption correct? If not, could someone explain why the plastic doesn't melt?

• Answer:

  Sorry dude I need the 2 points