That's exactly what I do. Sometimes I want something in my carry-on that I had not planned to take on the way out. With a spare baggie, I'm always prepared. And if anything is questioned, it can go in the baggie.

Having said that, I fly with the Tide stick thingy every week and haven't had it questioned yet. I also have hand cream in my purse every week, and it's never once been found or questioned.

drsusan