For both oils and acrylics, I pack tubes that are small, I put them in a see through plastic bag and then in a stiff tupperware type of container and add a materials sheet for the TSA. I try to stick to somewhat limited pallettes. For oils I use water soluable types when I am travelling. I take panel carriers and canvas panels to paint on mostly. But if I can take a checked bag. I check my clothes and shoes and carry on canvases so I can paint even more. I have a tripod easels and a pochade box.