At first glance, This Sponge doesn’t really look like something that belongs in your kit. It reminds us a little bit of a bra insert, or perhaps a deflated raindrop cake. But, as the makers have explained, it’s designed to blend in product while minimizing waste (due to the material’s lack of absorption). Additionally, since it’s completely transparent, it allows you to see exactly what you’re doing through the sponge. 3 different colors