Boards

or a satchel.

http://tinyurl.com/35v6jb
i've refrained from buying anything like it myself though, still content with an ancient backpack which has lasted about 5 years

'Oh yea, hi, I got tons of haggis that's just going to go off, fancy coming over...have a wee drink....watch eastenders?

Or was it:
'Munch on my haggis then wee on my face whilst I mastubate, watching Eastenders?'

There's a bit of a difference

https://www.manhattanportage.com/catalog/product_info.php?products_id=114

Does the job

you can hardly fit anything in them, and if you put lots of stuff in it it weighs heavy on yr shoulder. i'm reverting back to back-packs these days