I always assumed they were there for texture so the cup was a little less slick in your hand.
Edit: I didn't have the images on and I was picturing the ones with all the lines in the middle part. Ignore me.
I always assumed they were there for texture so the cup was a little less slick in your hand.
Edit: I didn't have the images on and I was picturing the ones with all the lines in the middle part. Ignore me.