You have to do some pretty extreme gymnastics to lose a carabiner
Or idly play with it while doing something else
Get yourself something other than your keys to twiddle in your hands. I recommend keychain tools similar to these things.
If you are prone to losing what you twiddle, Atwood’s tools are kinda expensive to lose but e.g. the Gerber Shard is about $5.
Spinning rings, like this one, work pretty well for twiddling.
Or idly play with it while doing something else
Get yourself something other than your keys to twiddle in your hands. I recommend keychain tools similar to these things.
If you are prone to losing what you twiddle, Atwood’s tools are kinda expensive to lose but e.g. the Gerber Shard is about $5.
Spinning rings, like this one, work pretty well for twiddling.