I love Tea Tree oil. Sells for about $24 for a bottle (1 oz?) of the essential oil up here. My mother in law bought us a bottle as a gift about a year & a half ago and it's still over 3/4 full. It's good for many things; I use it all the time….and a little dab'll do ya!
I also bought a no-chew spray with tea tree oil in it; I think it's the same Odo-Ban product. Maroon bottle? It sounds like the same stuff- I sprayed it once and had it in my mouth & nose and kept tasting it for hours....yeccccch!! They ought to market it as a diet aid; my food tasted foul for the rest of the day & I didn't want to eat.