The closure mechanism on this tote bag is a zipper. If you prefer grey bags, then this should you just fine and it has a volume of 14 litres.
From Wardow
Fjällräven Kånken Totepack Tote bag dark grey
The product is available from £76.94 at international stores.
Trekkinn
Fjällräven Kånken 14l Tote Bag Grey