
Milk jug ring: the real no-diet diet.
These two turtles experienced a different kind of plastic surgery. When they were wee turtlettes, they crawled through plastic waste that stuck to their small shells, holding them captive to the ring’s circumference and inhibiting proper growth. As they got older, their exoskeletons amazingly grew around the plastic rings! Man messes with Nature. Nature messes with Man.
Obligatory PSA: Cut plastic rings before discarding. Prevent yet another turtle from turning into a creepy animal:

Another method of controlling one's waistline.