[MintMark]

I mean literally...

http://www.reallyusefulproducts.co.uk/uk/html/onlineshop/rub/b11_0litre.php

this box fits under the boot floor (with or without the box lid) and lets you organise whatever you keep down there. Very sturdy too...

 

[Totallyrandom]

And with free delivery when you spend over £500, you only need to order 73 of them to benefit! You can have one for the car and 72 for around the house. Good job they're really useful!

 

[MintMark]

Hah! Maybe I should have mentioned that they are widely available in shops that sell home wares or office supplies. I bought mine in a hobby and craft shop.

 

[sirron]

I bought three plastic boxes from Home Depot ($5.00each) and a tray from PepBoys $20. they fit just great in my Mini.

Plus I stole a net from my wife's Subaru - it fits just great.