I mailed shampoo and conditioner about 10 days ago. It was the first time I've ever had a clerk go to the back to double check if she could accept it. She said they'd had a meeting and had been told not to accept any liquids - something about how they were concerned that leaking liquid had caused a malfunction with a plane. But she took the package anyway, after asking me how I'd packed it. So YMMV somewhat, but it's probably fine.