Petridish

Triple Vent Radiation Sterile: Vented dishes have elevated lid
which allows for good gas exchange and encourage
evaporation. This design is useful when the poured dishes are
to be used as soon as possible. The design of the dish
maintains sterility because the particles would have to go up
and over the dish wall to get inside which is very rare in normal
airflow. PS confirming to US FDA 21 CFR.