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I'm not completely sure, but it depends on the material of the bottle I'm pretty sure it's an insulator if its made of plastic. Sorry if I'm not too clear.
Everything conducts heat, but a hot water bottle is designed to insulate, not conduct, so it doesn't lose heat too quickly and end up a cold water bottle. It does this by using water, which has a high heat capacity (a lot of energy must transmitted to cool it down), plastic, which is an insulator, and a furry coating, which traps still air, which prevents heat loss via convection.
Ice cube requires heat to melt.Water conducts heat well. Therefore the temperature of the environment is absorbed by the water and the some of the distributed heat is taken by the cube and it melts.Air is an insulator. The only way heat from surroundings can go to the ice cube INSIDE the water bottle is by convection of air currents. But the convection is restricted to some extent by the almost closed water bottle, which has high(compared to cube size) plastic walls (plastic: heat insulator) on all sides and a narrow mouth. Therefore the convection and thus passing of heat to cube from surroundings is slow and this makes the ice melt slower in the empty water bottle.
You should try looking through any plastic bottle.
I'm not sure
Plastic is an insulator.
insulator
What is the bottle cap made of?
insulator
I'm not completely sure, but it depends on the material of the bottle I'm pretty sure it's an insulator if its made of plastic. Sorry if I'm not too clear.
Yes A2: Yes, If it's a Foam cup. Not if it's simply a solid plastic cup.
Everything conducts heat, but a hot water bottle is designed to insulate, not conduct, so it doesn't lose heat too quickly and end up a cold water bottle. It does this by using water, which has a high heat capacity (a lot of energy must transmitted to cool it down), plastic, which is an insulator, and a furry coating, which traps still air, which prevents heat loss via convection.
Metal - very good conductor of heat. Not a good insulator at all (Don't wrap cans in aluminum foil.) Glass - A little better resistor of heat energy transfer but still not great. Plastic - Depending on the exact material, plastic is probably your best bet. Especially if it's a foam of some sort; the air bubbles in the foam create barriers that heat energy has to cross to be able to escape.
you get a plastic bottle
Styrofoam is excellent
Traditionally, Thermos bottles used borosilicate glass for the vacuum insulator, with a plastic or metal envelope. Modern Thermoses are typically made entirely of steel.
A plastic bottle shape.