I know it's not 100% secure. It can be broken. So, Don't use it only to secure your Seed. It's interesting, Fun, and can be necessary sometimes.
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Warning: Order at least two Mugs from different shops to print your Seed phrase, and never order online. If you can Order more than two Mugs, It will be better. Use it as a secondary seed phrase backup.
I'm sorry; I commend the effort, but it's a terrible idea. The security issue is not that
'it can be broken'; it's that you're literally giving someone a clear view (maybe even written form) of your seed phrase! No matter how many more backups you have of this seed; you've now literally handed a stranger a copy of your Bitcoin seed words. Dividing it on more mugs just makes it more complicated to restore, seeing as even on this one you made, you haven't numbered the words.
So as Loyce suggested, printing an address QR code or a
Lightning BOLT12 QR code would be a 'fun, sometimes useful' gimmick, but
please not for seed words.