A person opening a can with can opener
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All You Need Is A Can Opener To Open Stubborn Plastic Packaging
Opening a molded plastic packaging is difficult, as
it's usually tough to cut through and capable of wounding fingers with its sharp edges. A can opener can be an easy solution.
Sharper than scissors and safer than knives, a can opener can be used the same way it's used to open cans. Clamp the cutting wheel on the packaging's edge just inside the seal.
As you turn the handle, the wheel will move along that edge and cleanly remove it from the end of the package.
In a matter of seconds, with virtually no struggle, the entire edge can be clipped off, allowing the rest of the package to be pulled open as air gets into the space.