This tray is included in the bottom of every thermal bag we make giving the base additional stability. It is 13-7/8″ long by 10-3/4″ wide and 4/5″ high. This is also sold as an accessory item to replace broken or lost trays. Some programs also like to add an additional “separating” layer inside their taller ( TB20 A/E Jumbo or TB16A/E Large) thermal bags.
For separating purposes, you might also consider using the “TB-Pad” which is an insulated pad that is included with all our “A” style, non-electric bags, but can be used as an additional thermal barrier in the electric bags or as a layer to contain heat midway through a bag in the A style.
