This is a simple lid for 5.5oz cat food cans (tuna can size). This lid should be printed with TPU as it's set up with a negative tolerance to ensure a tight fit. You need to be able to stretch the material slightly to put the lid on and TPU is perfect for this.
The author remixed this model.
This is a remix of the 5.5oz v6 model. I was having issues with the original because it was way too loose. I scaled this a bit to have a proper air-tight fit when printing with TPU.