One Size - Brand New
(sac in photo not included, only the SodaSac)
The SodaSac snaps onto the handles on the side of the Sac to hold your beverage of choice--allowing it to swing, just a bit, inside of its internal pouch which acts like a mini gyroscope to help keep your drink upright (but if you jump onto your Sac with a drink in it, it will still spill--but it doesn't really matter because all of these things, including the Sac cover are machine washable.)
