@startuml
!include <material/common>
!include <material/cup>

left to right direction
skinparam defaultTextAlignment center

rectangle "<$ma_cup>\nContainer" as container #LightBlue

interface " " as q1
interface " " as q2
interface " " as q3
interface " " as q4

q4 --> container: Q_in
q1 --> container: throughput
container --> q2: overflow
container --> q3: Q_out
@enduml
