Dude... sats card from coinkite. Affordable, great form factor. I've been playing around with them lately. It's essentially an NFC-enabled hardware wallet that you use as cash because the private key can't be read without causing a physical change on the memory slot that can be detected by the app, so the receiver is reasonably sure that you don't have a backup.

I had a post about this recently with some helpful comments.

satscard.com

They have some very cool designs but if you want to keep costs down the simplest one is $7