Ideas For Rewards - Including Free Ones
It may not be practical to give yourself these straight away but you can grant yourself permission to have them after 5 minutes. You can schedule them after 5 minutes. You can buy them online after 5 minutes.
I suggest you do NOT use replacements as rewards. You can eat the replacement anyway. The rewards are ways to change your automatic response to NOT use food as a reward. Or drink for that matter.