Just because all civilization as you know it has been wiped out in a nuclear apocalypse doesn't mean you can't enjoy a tasty soda now and again.
EDIT: Some people in the comments have noted that this seems like a reference to the Nuka Break video. I had never even heard of it, so it's not a reference, but I can see how it would seem that way. Thanks for telling me about it, though! It's an awesome video, so I'll go ahead and link to it: [link]
MLP is owned by Hasbro.
Fallout 3 is owned by Bethesda Softworks.