Topeak have come up with a nice bag that suits the Swift perfectly. It has several variations and can be found on Topeak's wesite. Called the Mondopack it sits snugly behind the saddle and is useful for day rides. I have the XL version which expands but it is still not that big.



You load it via the left side and it can take a waterproof, innertubes and perhaps some food with your tools held in the right hand pocket.



There is a version which carries a water bottle and the bag has a tab for holding a rear light.



I think it looks good and is fine for day trips where you don't need to carry much stuff.