Plastic Container silhouette 9 months 1 Gas pipeline valve silhouette 11 months 0 Earth silhouette 12 months 2 Boiling Kettle silhouette about 1 year 0 Boiling Pot silhouette about 1 year 2 Oil lamps silhouette about 1 year 1 Truck silhouette about 1 year 0 Truck silhouette about 1 year 0 Stove silhouette about 1 year 1 Gas lighter silhouette about 1 year 0 Gas tanker silhouette over 1 year 0 Gas Can silhouette almost 4 years 8 Gas Can silhouette almost 4 years 15