These extra-ordinary bags by Williams British Handmade are by Sarah Williams. Generally the pieces are artworks inspired by vintage bags and made into strange shapes. They utilise traditional craftsmanship techniques and translate them into ultra-modern abstract pieces which seem to tell a strange, fantastical story.
See more of these amazing pieces at: http://www.williams-handmade.com/collections.html
I'm not sure what this bag is designed to carry, maybe a piano accordian?