Burn it with fire till it’s cinders is probably not bad too, but nothing beats industrial shredding

Does drilling through it where indicated work?

Some people are suggesting to avoid destroying the coldcard as if they eventually recover funds, you will want to prove you still own the address by signing🤷‍♂️

Hollow point, not full metal jacket?

Secure your wallet, secure your meat funds, overwrite that seed.

Supposedly they saying to keep Incase funds recovered can use as proof they were yours.