I'm surprised they'd let you do so in the claim luggage, but in this case it was carry-on. The story goes my mother just walked through customs and got on the plane with it.

Yeah carry on got the stupid liquid ban that's still around, but I don't think much if anything got banned from checked luggage after 9/11. Just the standard stuff like batteries and other things that could have issues in an unpressurized non temperature controlled hold.

Even carry on got a lot better than it used to be in the days right after that. Like I'm pretty sure they had banned lighters for a bit (and a lot of people assume they still are) but they're explicitly allowed and I throw mine right into the scanner bin every time I fly. Not even being able to carry in a sealed bottle of water and having to take your shoes off is stupid, but about the extent of what's left. No more keeping all liquids (what even counts as a liquid?) in a ziplock bag and having to take it out, and even laptops can stay in with the new scanners they're rolling out

I've carried on an inflatable life vest with an active CO2 cartridge and that's also listed as fine. Though it did get flagged and secondary screened because it was in my bag, even though they don't say you have to leave it out.

In general the more you fly if you pay attention, you can pretty much know what will trigger it if you put it in your bag. Metal water bottle in the bag? Your bag is getting pulled, every time. I've even told them right where to look lol. Left out and it goes right through.

it's kind of funny, my mini bottle of spray sunscreen got flagged, but carrying through a fullsize BP 95 v-lock tv camera battery did not, and it uses the large battery cells that are roughtly the size of a roll of silver dollars.