I've got Ivar shelves for storing books and LPs.
The shelves come in different sizes; mine are 800mm x 300mm and 400mm x 300mm. There are also deeper (front to back) 500mm shelves, needs different upright supports, but I don't have them.
Obviously use the 400mm shelves for heaver stuff; the shorter ones are filled with LPs and I use the longer one for books.
These shelves are made from solid wood (OK actually smaller pieces glued together) and are stronger and lighter than any chipboard or MDF.
But I wouldn't use them in a garage or shed because they're too nice for that, garages and sheds tend to be dirty and smelly places. I think metal shelves would be better for the shed or garage, or make up something from eg pallet wood.
And anyways, aren't garages and sheds the worst place to store wine?