For international flights departing or connecting in Viet Nam, you may bring liquids, aerosols, gels (personal toiletries, perfume, hair spray, aerosol, etc.) on cabin as long as they must be in containers up to 100ml for each, all are sealed in a plastic bag and completely closed. These liquids following are exemptions:

• Medications have to accompanied by prescriptions in which clearly state the name and address of the doctor who prescribe a medicine, the full name of the person air tickets or boarding pass in case of electronic ticket.
• Baby milk/foods have to be accompanied the baby when taken on board aircraft.
• The liquids, aerosols, gels purchased either at airport duty free shops or onboard aircraft are exempted from above limitation of capacity providing that such liquids have to be packed in a transparent sealed plastic bag provided by seller.

On domestic flights, you can bring liquid items with no capacity (except salted fish and other odor liquid).

Non-radioactive medical drugs, medicinal or toiletry articles (including aerosols) such as hair sprays, perfumes, colognes and medicines containing alcohol and non-flammable, non-toxic aerosols with no subsidiary risk for sporting or home use are brought as checked baggage as long as the net quantity of each single article must not exceed 0.5kg or 0.5L and the total net quantity of all such articles (include as carry-on and checked baggage) must not exceed 2kg or 2L per each passenger. Release valves on aerosols must be protected by a cap or other suitable means to prevent inadvertent release of the contents.