Silver fumed borosilicate nectar collector. The Maria has a flat spot so it won’t roll away. These ask come out a little different the dots might be a different color and the fuming will look a little different. The do change color once you start using them you will notice hues of purple and blue. Disclaimer: This is handmade by yours truly and is definitely not intended for anything other than cbd use... Otherwise it's purely just a functional piece of art. Must be at least the age of 21 to purchase.