Is there a way to create global dropdown lists without using a third party integration?

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I found the following solution that does exactly what I am looking for

https://www.smartsheet.com/marketplace/apps/smarter-dropdown-list-manager-smartsheet

but it is a third party app integration with Smartsheet. I'd like to do this without having to use an integration. Getting my company to purchase yet another software integration will take more than just sacrificing the intern by throwing them into the volcano. Any suggestions or tips?

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