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2. Package handle - Wikipedia

   en.wikipedia.org/wiki/Package_handle

   A handle can be defined as “an accessory attached to a container or part for the purpose of holding or carrying.” [5] Sometimes a handle can be used to hang a package for dispensing or use. Handles can be built into a package, sometimes in the form of hand holes or hand holds. They can also be attached to a finished complete package after ...

3. Steel and tin cans - Wikipedia

   en.wikipedia.org/wiki/Steel_and_tin_cans

   The ends are known as easy open lids because they open without any tools or implements. [54] An additional innovation developed specifically for food cans uses a tab that is bent slightly upwards, creating a larger surface area for easier finger access. [55] Cans can be made with easy open features.

4. Limoges Box - Wikipedia

   en.wikipedia.org/wiki/Limoges_Box

   The first Limoges trinket boxes were long narrow containers that were created for expensive needles. From here, other shapes of limoges porcelain boxes evolved. The earliest were those that held thimbles and embroidery scissors and then round flat Limoges boxes were formed and used as powder boxes, and/or snuff boxes. Under Louis XIV these ...

5. Faraday cage - Wikipedia

   en.wikipedia.org/wiki/Faraday_cage

   Animation showing how a Faraday cage (box) works. When an external electrical field (arrows) is applied, the electrons (little balls) in the metal move to the left side of the cage, giving it a negative charge, while the remaining unbalanced charge of the nuclei give the right side a positive charge. These induced charges create an opposing ...