Brass Material For Door Knobs
If you are great at catching details, perhaps you have noticed that doorknobs are typically made of brass. Why is this? Apparently, brass surfaces resist bacteria buildup more. This is very important since a lot of people touch this object. Can you imagine what it would be like if they used another material for it?
Brass Material For Door Knobs
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Bottle Cap Discs
Have you taken a peek underneath the soda bottle cap? If so, you probably saw the plastic disc there. You might think they are unnecessary, but they actually help you see through the carbonation. We do not know exactly how it works, but the disc traps carbon dioxide and prevents the fizz from going.
Bottle Cap Discs
