Whether for school or work, you can always find a good use for a backpack. Since it only comes in red, your colour choice is made very easy and it has a volume of 26.5 litres.
From Amazon
adidas IB8653 TIRO L BACKPACK Sports backpack Unisex team power red 2/black/white NS
Lovell Sports
adidas 23 League Backpack Unisex