Newer Thetford RV fridge shelves are not built from round but T-shaped spokes. Goods on the top shelf can slide to its back and block the self-dry drain, leaving the food all wet.
So I designed a shield and holders to build a stopper. The stoppers are fixed to the spokes via a quarter turn.
A shorter shield may be installed parallel to the spokes, making a nice divider.
The author marked this model as their own original creation.