How strange! Mine has clear plastic trays! I agree though, it is a great bit of kit, and I am gonna try the latest offering in a short while. The missus has knocked up some apple flakes, we hope they will be similar to the apple flakes used by soldiers back in the day when ration packs were a good thing. I'll try them and if they work will get back to you all!
Carrots are good, once dehydrated they are tiny. Put them back in water, and you have to be careful how many you put in, and they go back to original size, as if they were just cut! One or two people have inadvertently made a carrot stew by putting too many in!