What is a deeper bottle cap lol, 5 inches lol. At 5 inches, the F75 will correctly identify everything in the hole. I feel bad if I dig all the bottler caps. We wouldn't have anything on this thread to post about. The truth is, if you know how to use your machine correctly, you can clean a area of most targets. I have some heavy hitters here, they leave the pennys, I know when I only find pennys, someone beat me to it. Its a game, kind of like my toy is better than your toy. Sometimes I leave a tell, a bottle cap, or piece of foil I know should set off most detectors. If its gone when I get back, you just know someone else hit it hard. My F75 is wearing out, having some issues, and still kicking butt out there. But Im gonna have to get a new detector soon. If you cant afford a minelab, get a T2 or F75, you wont be disappointed. But there is some awesome videos out there with folks using the AT Pro and AT Gold. Im fairly sure I could trip you up in certain conditions. I would like to see you at guys get excited about the hobby and not be such Boom Babys about the hype.