Rare vintage Jones Zylon plastic divided serving food tray camping six trays

These vintage serving trays made by Jones Zylon (two tan) and (4) are marked just Zylon. The Jones Zylon company is the next town over from me and I purchased these at an estate sale in West Lafayette Ohio. They are institution grade made for hospitals and prisons. The two tan have four compartments and two long utensil spaces at each end. They measure 14” x 10 1/2”. The four blue/ green trays have four food compartments one drink and one utensil. They measure 14 1/4” x 10” There is some fading to the color on some of the trays (or it’s possible it was a manufacturing color defect and that is how they ended up in the general public hands. The trays have been used but they have plenty of life left in them. I have washed them and they are ready to use. Great for outdoor use camping picnics or the fussy kid that doesn’t want their food to touch. Due to weight no bundling with other listings. Thanks for looking