Bowl Cozy for Corelle Ware

These are bowl cozys for Corelle bowls. The brown pattern is from the 1980's and the blue pattern was bought in 2017. Both seem to fit fine. I printed the white sample in PETG and the black in PLA. These seem to hold up to light microwaving fine. I tested both by placing a bowl in them filled with water and then microwaving for 5 minutes. There was some softening of the layers in contact with the Corelle bowl but no deformity. Both have been washed in the diswasher.