How to trademark your own SMALL shipping box? I need to ship this small item to my sister, about 3...

I need to ship this small item to my sister, about 3 inches length, breadth: 2 inch,

I want to make this box that;s STRONG. I have fatty weight paper, but I'm not sure if it's going to ship soundly.

the item is a home fragrance oil. dimensions includes paper wrap & bubble wrap.

TIA
Has anyone tried Thomas Liquid stainless steel paint?
Answers:    The pack and ship places cut a small box down near a razor and pack the snot out of it.

2nd choice is box inside a box. Thats the best really.
I requirement to know what the best item...
The US Postal Service will give you a free shipping box. If you want to sort your own, heavy paper is not strong satisfactory. Take a piece of heavy cardboard -- if you don't have any, find a good clean box (from detergent or something approaching that, not fruit or veggies) from a grocery store, and cut off a flat piece about 14" by 10". Put your parcel (including the bubble warp and paper) contained by the middle of the cardboard, and using scissors make a slight indentation all the mode around it, allowing a tiny bit of space. Fold the cardboard up around the four sides. Then fold in the sides, almost like wrapping up a endowment -- VERY CAREFULLY, NOT TO DAMAGE THE GIFT. You may need to trim more cardboard off. Then stamp all loose sides/ends with packing cassette. Leave room for the mailing label.