Works well to put a piece of raw meet or fish also if you start catching honey bees.I use a similar mix of 1/2 cup apple cider vinegar, 1/2 cup apple juice, 4 tbsp sugar in traps like to this. I change it every 3-4 days as the liquid is full of bald faced hornets/yellow jackets.
I get about 20-30 in each trap for the last couple of months. No bees just hornets