I can see every item, I am a minimalist fridge person.

I have in there at the moment:

Milk
A block of real parmesan cheese (in a plastic container)
Jug of water
Bottle of lemonade
Meat keeper with frozen steak in it (have taken it out for dinner tomorrow night)
Tupperware container with fresh veggies in it (again for dinner tomorrow night, bought them today)
A container with lunch for tomorrow in it
Half a loaf of bread
A plastic bag with stuff to throw away (some leftovers) which will go out on bin day.

I clean my fridge out every week, work out what needs to be bought for the week (farmers market on Wednesday).