First version [link]
This second idea of "muffin bags" C:
It's for sale so if you want it note me.
Front is made of fleece, striped fabric is cotton, inside is a black cotton fabric . With a zip fastener . Also inside it have 2 pocket(one for mobile phone) and 3 small pocket for penicil, ballpen etc .
Payment through PayPal.ONLYNOW ON ETSY
Price:30 $ / 23 € + shipping costs