I designed a simple pot spacer clip for most pots.  I use these on my Lodge cast iron pots to seat the lid a little above the pot lip and prevent moisure buildup.  I also use it for my Le Creuset dutch oven to protect the enameled insides.  I use plain PLA for mine but these would work with TPU for  a more rubber like finish.  The one side is straight while the other is at an angle - these clips can then be rotated for use in a number of different pots with staight or inclined sides.