score:3
No. Leather is transparent to x-rays (just like human skin, which is why medical x-rays work). If they see a large enough mass that they can't see through (if you happen to travel with a lead-lined bag for instance), they'll usually want to take a look at it. It's more likely that the officers don't care, especially because the liquid containers in question are small. My experience is that they sometimes aren't particularly strict about the "take all your liquids out separately" rule (and TSA Pre explicitly allows you to leave your liquids in your bag) as long as they don't see large bottles.