Can you pack mase in checked bags?
It depends on where you're going - mace is illegal in many other countries. But within the US, you are allowed to have one container, up to 4oz in size, in your checked bag. From the TSA website: "One 4 fl. oz. (118 ml) container of mace or pepper spray is permitted in checked baggage provided it is equipped with a safety mechanism to prevent accidental discharge. Self-defense sprays containing more than 2 percent by mass of tear gas (CS or CN) are prohibited in checked baggage. For more information, visit faa.gov. We recommend checking with your airline as some may not allow this item in checked bags."
Many airlines will allow passengers to carry up to four ounces of pepper spray or mace in a checked bag, but policy varies by airline, so you need to check yours.