Do you specifically want to use disposable batteries,single cell CR123A's.
or do you mean that as a flashlight size category?
I have a lot of CR123 size flashlights,
but I never use disposable batteries in them.
I only use Rechargeable batteries.
Niteye Stepless Rotary, Novatac Clicky, Sunwayman Stepless Rotary
my longstanding personal favorite is the
It can use disposable CR123A (aka Lithium Primary),
or rechargeable Lithium Ion (aka LiIon) 16340 (aka RCR123A),
and also 18350 (my personal preference)