School projects can be fun, educational and inspire students to learn in ways they cannot through standard classroom instruction. School projects that involve building a Thermos will teach students how a Thermos keeps hot things hot and cold things cold. There are many ways to build a Thermos; try this simple one first.
Cut the 2-Liter
Cut out the bottom of a 2-liter bottle and set it aside.
Insert the Water Bottle and Cut the 2-Liter
Place a smaller water bottle inside of the 2-liter bottle and cut a hole at the top of the 2-liter bottle, making sure that the new opening fits snugly into the 2-liter bottle.
Tape the Aluminum Foil
Take the water bottle from the 2-litre. Tape aluminium foil onto the water bottle. This will reflect heat from the liquid back into the container instead of allowing it to escape.
Apply Expoxide with Caution
Place the water bottle back into the 2-liter bottle and begin to coat it with insulation polyepoxide, also known as epoxy. Be sure to coat the space between the 2-liter and the water bottle slowly and evenly with epoxy. Place a small amount of the expanding foam in the bottom of the 2-litre. Epoxy is a two-part adhesive that must be mixed prior to applying it and can come in the form of putty, glue or paint. A heavy coat of mixed epoxy should be applied slowly because it needs air to expand. It is advised that you work in a well-ventilated area to avoid inhaling excessive fumes, which may be toxic. Epoxies vary in texture and may take a long or short time to dry. The use of goggles and gloves is also recommended as a safety precaution considering that epoxy may be hazardous to the skin.
Reattch the 2-Liter's Bottom
Reattach the bottom of the 2-liter bottom once the polyepoxide has expanded and filled both halves of the 2-liter bottle. Use duct tape to seal the 2-liter bottle securely. Your final product should be a water bottle that is fully sealed within a 2-liter bottle, with only the smaller water bottle's rim exposed. This Thermos model is designed to function just as a store-bought Thermos, with the same heating and cooling limitations for the contents.
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