Best Pack for Air Travel?

[ChinoTJ]

I used this combo whit no problems Brother, a Bathroom Sink and a Bathtub

 

[MatSteelersFan]

I used this combo whit no problems Brother, a Bathroom Sink and a Bathtub View attachment 1069535

I have to find myself a bathtub one of these days, they're so cool.

 

[GhostSnacks]

very interesting maybe it's just aussie airlines that don't like larger backpacks as carry-on..

 

[karasugenji]

I also use my hot tub duffle for my check in. Never had a problem with anything.

Was planning to use my new hot tub for my next trip but to afraid to damage it or get it stolen