Custom Leakproof Storage Dishes

I would like three, round, plastic, covered dishes/plates primarily for transporting food to an outdoor dinner. The dishes should be designed to be leakproof, making them ideal for transporting food in a cooler to a picnic site. I have a three-tiered stand...I want to be able to take off the lid and place the dish onto the stand. (Think covered plate that you get to go meals in).

Dishes should be approximately:
- 13 inches
- 11.9 inches
- 9 inches
The dish will need to have an indentation for the legs of the tier. (See picture)
Ideal skills and experience:
- Expertise in plastic design and manufacturing