It depends on the scaling, whether we are assuming it is 3 dimensional (since it is just an image), the mass, whether it is airtight, what kind of gift it is, who it is being sent to, who it is being sent from, what the volume of it is, whether there is any significance of the exterior, if in actual fact the box is considered a gift itself (once again, who it is being sent to), what sort of reality this box exists in (ei. steampunk, modern, medieval), whether in actual fact it is a present or if it is a bluff/trap. Jeez people these days need to give the significant information for things like this or you will just get ridiculous answers Also, as this is a Schrödinger's cat situation, we cannot assume there is anything in there at all. So taking this all into consideration, I'm gonna say... Sagittarius A*
Inside the box is the thought of the unknown, not having the knowledge of knowing what is in there, therefore, in side the box is the thought of something being in there, so there is only what you can imagine that is in there. #Inception
Inside the box is nothing. It isn't real. There can't be anything inside. However, if a video is made to open the box and something is inside, it was never really inside as it's just a different image completely which looks like the first picture. If you were to open the box, you'd probably move the top towards you meaning it was a different frames put together to crate a realistic box being opened. But if you are going to play a video of someone opening a box in real life, then I agree with SwimHornet, it's your mum TL;DR There is nothing inside because it isn't real
