Using a plain tote bag and some Posca pens you can create your own personalised bag, which is what I started doing recently. You can draw the design on with a pencil first or draw free hand. The posca pens are perfect for this as they are pain pens so it is easy to colour, draw and blend colours together. You can wait for a part to dry and then paint part of the design on top of it.
This is one of the first bags I created which was for my sister (but I made myself one too), it is based on the lyrics of one of my favourite songs by Kimya Dawson:
In the sea there is a fish
a fish that has a secret wish
a wish to be a big cactus with a pink flower on it
I had lots of fun with this little project and I will be making many more bags. All you have to do is draw the design, wait for it to dry and then iron on reverse. As simple as that. The only thing I have left to test is whether the design holds up when washed, it has survived rain so far so I will update when I have put one through the wash.
I also made a Mean Girls themed bag for my housemate as it was her birthday recently:
I'm pretty proud of this one as it took such a long time and looks pretty good (even if I do say so myself).