There should be a blue and a green bag somewhere above.
I bet you're still using the same bag you used in the winter, and what's worse is that you think it's okay, no one will notice or care. Well, once you put it aside and pull out a lighter, brighter bag everyone will notice how much summery your looks are, even if you're wearing the same clothes you wore with your weighty winter bag, plus you'll feel more summery. :)
Does anyone have any cool (yes uni hasn't advanced my vocabulary) bold coloured summer bags?