Not long ago I had a chance to speak at a company that files tubes with substances. From toothpaste to glue, a ton of stuff can be encased in the tubes. It's a packaging process I've taken for granted.
I was surprised to see how the tubes are filled. I had always assumed it was done through the cap. But it turns out they are filled through the bottom, which is later sealed. Knowing that, it became obvious that this was the most productive way to get the job done. But I have to admit, I never would have thought of that if I had not visited the factory.
This is a great example of how we can have a preconceived notion of the best way to do something. By doing a little homework you can find out that there may be better alternatives.
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