Hey, as the next CloudFest is about to start, i designed those keychains, utilizing a royalty free cloud SVG and one of the last Cloudfest logos. This is not an official merchandising article. I did provide a couple of them free of charge.
I needed the Logo for the font.:

The hole for the keychain is centered, in order to be even. Drawing around those SVGs was done in Fusion 360:

As stated, those files taken are creative commons. I would suggest to ask the event organizing team prior usage of those.
But when used for free (e.g. giveaways) that should be fine. In combination with recycled plastics, that's even better, since tradefairs tend to use single-useable plastics, mostly mineral oil based. Keychains are still single-use “giveaways”, but the material might not be exclusively produced the first time for its usage, e.g. when using material the “Recyclingfabrik” or other companies provides.

I did a first test (without the hole) - A 256mm³ Printer (A1/P1*/X1* etc.) can print 16 or more of those keychains at a time.

Happy printing, in case you're both into 3d-printing and cloud-technologies: See you at CloudFest 2024 :)