Those giant plastic lens hoods are miserable things. They add 50% to the size of you lens, make it impossible to get in and out of your bag, and are constantly falling off. The other problem is that when you have a filter on the lens, since the hoods are attached to the lens barrel, you lose about half the coverage.
What I use is the old fold down rubber unit from my Mamiya 180mm lens. It's way more compact, and is just as effective as the big plastic one I had on my 70-200mm.
David Buzzard