How to Make Insulated Tumblers


Insulated tumblers are a great way to keep beverages hot or cool longer then an uninsulated cup could. Finding and purchasing them is easy enough, but making a set yourself can save a little money and provide a simple craft for doing in the home or as a school craft. Additionally, you may create tumblers that can be taken apart and cleaned, whereas manufactured tumblers are often impossible to disassemble.

Things You'll Need

  • 2 plastic cups of differing sizes
  • Flexible foam sheet
  • Scissors
  • Plastic ring
  • Hot glue
  • Select two plastic cups that are durable -- not the disposable kind. Be sure that one can sit inside the other, and that there is a small gap between the two on all sides when the rims are at the same level.

  • Select flexible foam of a thickness that will fit snugly between the two cups when one is inside the other. Cut two pieces of the foam -- one to fit the circle between the bottoms of the stacked cups, and the other to wrap around the outside of the smaller cup, between it and the larger cup. If the two rims are not level, you may need to add more layers of foam between the cup bottoms to bring them to the same height.

  • Assemble the two cups with the foam pieces snugly between them. You should not need anything to hold them in place other than the friction of the foam against the plastic.

  • Place the plastic ring -- which should be large enough in diameter and thickness to cover both cup rims -- atop the assembled insulated tumblers. Carefully hot glue the ring in place to hold the cup together and cover any openings between the two. Clean off all excess glue thoroughly. You now have an insulated tumbler.

Tips & Warnings

  • Hot glue will work to easily hold the cups together, especially if the smaller cup is raised on enough foam to make the two rims level. However, you may wish to use superglue for more durability.
  • Get creative and decorate the foam before you put it between the plastic cups. If the cups are transparent, you can see your designs in the finished product.
  • Be sure to clean off all excess hot glue or super glue, so that none comes into contact with the liquids in the finished cups.

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