Items that I can buy for not to much at storesIt has to be wrapped around a plastic water bottle, with hot water insideThe water has to stay hot for around 40 minsThank you
Bubble wrap and styrofoamStyrofoam is best, and you can find old used coffee cups in the trash for thataluminum foil also helpsWrap the bottle in the foil, then layers of styrofoam, as thick as you are allowed There is a type of styrofoam, or plastic with bubbles in it, in any case, that is flexibleYou can find it used as packing materialCheck at a UPS or similar storeOtherwise use standard styrofoam cut to fitOr even styrofoam pieces held on with packing tapeOther tricksLet the bottle sit with hot water in it for a while to warm up the bottle and the inside of the insulationKeep the top closed tightly, and also insulatedInsulate the top and bottom as well as the sides .
EnergyAs the temperature increases, more energy can be transferred from the environment to the material you have (like ice)As energy is transferred, the chemical bonds formed between the water molecules in the ice begin to break and the ice changes into its liquid stateWith even more energy, the attraction between the water molecules in the water is not sufficient to hold them in a liquid state, and they separate into water vapor (steam)Hope that helps.
