I may be wrong but the shininess makes it look like hard plastic. I think silicone would be a better choice.
But how about an implanted one? A bag a father could get that can be filled from the outside with needle & syringe, connected by tubing to pores on the male nipple. Or even better, a breast implant that exudes hormones to make the male breast lactate.
I sense a business opportunity. “Fathers, get a pair of Lactaids today.”
I know; that trademark is taken.
