A Utility Knife’s Plastic Cap
There’s a thick plastic cap at the end of every utility knife. So naturally, everyone assumes it’s there to clip to their pants. But the plastic cap can be pulled off. The slit is then used to remove a tip blade that has grown dull and useless. And just like that, you get a new tip without any cuts or scratches.
Plastic Lids for Cups
The plastic lids on disposable cups were designed so people wouldn’t spill their drinks by accident. But the lids also have ridges that fit at the base of the cup. So, what you get when you order your morning coffee or soft drink is a cup with a fully functioning disposable coaster.
