Here are my Ninjago drink labels that I used for Henry's birthday party. I simply pasted each image into Microsoft Word, adjusting the sizes until four fit onto a page. Then, I printed them on photo paper, cut them out and taped them around short Gatorade bottles.
These labels are free for your personal use (that means enjoy them for your little guy's birthday party but please don't sell them on your Etsy site).
Some people have had a hard time getting these to work in a Word Document. I wish I was more computer savvy and could offer better help, but I'm just an amateur mom-blogger with little technical know-how. I've posted these images as photos, so you should be able to save them to your computer and reprint them in the program of your choice: a photo editing program, Word, Power Point, etc. You will have to manipulate the images to be long enough to go all the way around a small Gatorade bottle. I have a PC, so if you are working on a Mac, it may be different.
I will try my best to email the images to you directly, if you leave your email address in the comments section.