I think you need shirts. Everyone loves shirts.

Suggestions:

NurdRage logo on front. "Crushing Your Expectations To Explore Science Since 2008" on back.

On front in the classic red warning text:

"WARNING: The wearer of this T-shirt produces highly toxic gases. Interaction should be done outside or in a fume hood." (NurdRage logo somewhere)

Or something self-referential in classic NurdRage video style like that.

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Even though I'm already a Patreon Patron, I'd buy shirts, because they can be a good source of income to the channel, and, most importantly, I like owning fun shirts.

If you feel a need to explore some chemistry to tie the ultimate goal of shirt marketing in, maybe something like:

a) Reactions of various chemicals with different materials used to make shirts and other clothing. Simple. Could even serve as a safety video in certain ways.

b) Simple reactions you can do at home to create certain common polymers used in shirts. If there are any simple ones.

c) Interesting chemistry experiments you could do with old shirts as a reactant.

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Other shirt ideas, anyone?