i kno its prolly not hurting them however you must realize your turts are living things not dolls that you can dress up for the camera when there is nothing else to do and judging from the other pics you do this quite alot, they can get stressed and even though they seem fine dosent mean they are
I'm glad I'm not the only one that doesn't think this sort of thing is funny. It's probably rather stressful for the turtles and stress can lead to illness.. and vet visits.
From the first picture you can tell the turtle is not enjoying it. How can you judge whether he notices the bottle on his back, in relation to a turtle that bottle could weigh a quarter of its wight. That's like us carrying around 30 lbs on our backs, not fun.
I'm certainly not amused by what you are doing to the turtles. And judging by other photos you have posted you seem to enjoy treating them like toys for your amusement.