How to store duvets and pillows for sofa bed?

[ihaveadirtydog]

We have a sofa bed in playroom for guests (who come pretty regularly)
The duvet and pillows tend to just get slung on the sofa when it's not in use which obv isn't great.
Any nifty storage ideas ? (apart from vacuum pack bags which I never have any success with!)
Was thinking about creating a large cushion cover sort of thing that I could stuff it all in and turn it into a sort of beanbag (without beans!) cushion that lived in the playroom?

Have you seen the knitted spheres? I think if you could knit one of these it would be great for storing bedding in. Alternatively, I like the idea of making a large beanbag type cushion in a fabric that tones in with the room. Or what about some sort of wooden trunk or whicker basket?

No-haven't seen them-do you have a link? Sounds like a lot of knitting-I've only done scarves before!
Will explore my cushion idea further too.