She's bringing awareness to the disease — which her pal Nick Jonas has — by conspicuously posing for photographs with a bottle of Hint water in her hand.
Inside sources tell us that Miley is not a spokesperson for Hint (in other words, she isn't getting paid for the photos) but she is a strong proponent of the "Drink water, not sugar" message that is on every bottle of the water.
The shelved episode focused on Hannah Montana's response to a friend being diagnosed with diabetes. Some parents objected to the content after seeing a preview, so Disney decided not to air it.
The network has not been specific about what parents objected to, but did say it had "consulted with medical experts to inform the story and ensure that it was told responsibly" before the preview. The episode is being "reevaluated."