You will see that the Maelstrom ships in a pretty non-descript, flat black, cardboard box for transportation. The only thing to note really is all found on the one panel.
First of course is the product label. This says that this is the Maelstrom, a 5.25" dual bay reservoir. It then continues to tell you what you should expect to see in the box, like the reservoir, the temperature controller, UV LED, screws, half inch fittings, clamps, and the guide.
The second thing I like to see on water cooling components is a tamper-proof sticker. This shows you that since this left the factory, no one has gotten inside of the box and caused any malicious damage that you can't yet see.
After I cut the sticker and opened the box I found the paperwork, and a couple of hardware bags packed on top of the Maelstrom.
As an added layer of protection, the Maelstrom is shipped in an envelope of bubble wrap. While not as durable as something like high density foam, the unit arrived in great shape with no scratches to the face or the Acetal parts.