Tank containers must be at least 80%% full, to prevent dangerous surging of the liquids in transit. On the other hand, they must not as a rule be over 95%% full, or there will not be sufficient ullage space for thermal expansion. 

Tank containers are used for liquid cargoes, such as:

• Foodstuffs: fruit juices, spirits, sweet oils
• Chemicals: hazardous materials, such as fuels, toxic substances, corrosion protection agents