I recently picked up one of these stainless steel two-tube Fenix whistles:

It’s the right size and certainly loud enough, but being stainless, it’s a bit on the heavy side (20 grams) for my neck chain. Looks like I might have been better off with one of the Ti offerings (at around 12 grams) from 4Sevens (discontinued?) or Nitecore (NWS20).

Can anyone recommend a two-tube whistle that doesn’t have plastic inerts? (also tried one of those Vargo single-tube Ti whistles, disappointed at how cheaply it was made)