Modular cart

1. A food tray cart comprising:

a base;

four corner posts removably connected to the base;

a top plate removably connected to the four corner posts; and

first and second interchangeable shelf panels configured to support a plurality of shelves, the first and second interchangeable shelf panels removably connected to an interior of the food tray cart by a retaining clip, and the first and second interchangeable shelf panels removeable without removal of any other components of the food tray cart.

2. The food tray cart of claim 1 further comprising left and right side panels slidably received in the corner posts, the left and right side panels being identically shaped and sized.

3. The food tray cart of claim 1 , wherein the shelf panels comprise a back plate and a plurality of shelf portions extending at an angle therefrom.

4. The food tray cart of claim 1 further comprising:

first and second interchangeable side panels slidably and removably received in the corner posts; and

a rear panel slidably and removably received in the rear corner posts.

5. The food tray cart of claim 4 , further comprising:

a plurality of corner rods removably connected to the top and bottom; and

a door hingedly connected to one of the corner rods.

6. The food tray cart of claim 4 , further comprising a plurality of wheels removably connected to the base.

7. The food tray cart of claim 1 further comprising an upper cap removably connected to the top plate.

8. The food tray cart of claim 1 further comprising a corner rod removably connected to the top and bottom of the cart at each of the four corners thereof.

9. The food tray of claim 8 , further comprising a first door hingedly connected to one of the corner rods, and a second door connected to one of the corner rods, such that the first door and the second door are on opposing sides, so that the cart comprises a pass through cart.

10. A food tray cart comprising:

a top plate;

a base;

first and second interchangeable side panels;

a plurality of corner posts removably connected to the top plate and base, wherein the interchangeable side panels are slidably and removably received in the corner posts;

a rear panel, slidably and removably received in the corner posts at the rear of the food tray cart; and

interchangeable shelf panels configured to support a plurality of shelves, the interchangeable shelf panels removably connected to an interior of the food tray cart by a retaining clip, and the interchangeable shelf panels removable without removal of any other components of the food tray cart.

11. The cart of claim 10 , further comprising a door hingedly connected at one of the corners of the cart, wherein the door will rotate at least about 270 degrees.

12. The cart of claim 11 , wherein the door is hingedly connected to a hinge rod, the hinge rod being removably connected to the top plate and base.