Two.

- Why aren't you using the strawberry patterned glasses? Aren't those your favorites?

- Well.. there's only two of those.. if it gets shattered..

- It looses it's purpose if you never use them !

- You're right but it's so sad to see paired things torn apart.

Nana (Image Credit: Gabrielle Germano (Gee / Gabby-chan1994))