Just an FYI...We were at Disney Dec 14-20th, I brought 3 different bottles, everyday, to the parks. Yes, they were seen by security during bag check and no they did not say anything about them. We were at Epcot, Hollywood Studios and Magic Kingdom 3 different days. I did not try to hide them, they were clearly visible.
The Lavendar and Peace & Calming were a relief at the end of the day with our rambunctious and overstimulated 3 yr old.