8 TSA-Approved Items That Still Surprise Seasoned Travelers

6. Cremation Urns AND Full-Size Liquid Cremation Urns Are Different

Here's where it gets specific: while cremated ashes in solid form are carry-on approved, if you're transporting "liquid cremation" remains (alkaline hydrolysis), the rules shift entirely. This newer, eco-friendly process liquefies remains, and those containers fall under liquid restrictions—meaning checked baggage only. It's a morbid distinction most travelers never consider, but as green burial options grow, so does awareness. The TSA hasn't caught up with clear signage, so travelers often discover this at the checkpoint. If you're carrying traditional ashes, you're clear. If it's liquid-based, check it. Either way, it's a conversation nobody expects at 6 a.m. security.