As we told you before flying from Thailand have now become more difficult. If you flying with another aircraft after Thailand Please check might not be able to take the tax free gods on that plane. Even if they were approved in Bangkok the new airline can reject them as you go trough a new screening. To be 100 % sure do not buy any tax-free perfume in Thailand they are overpriced anyway.
. Liquids, aerosols, and gels, such as water, drinks, cream, lotion, oil, perfume, spray, hair gel, bath gel, various types of foam, toothpaste, deodorant, or any product of similar substance that is carried in carry-on baggage must be placed in a container not over 100 milliliters (or equivalent amount of measure, i.e. ounces). Substances totaling more than 100 milliliters will not be allowed on board, regardless of how little the amount of liquid, aerosol, or gel it may contain.
2. Containers used to carry liquids, aerosols, and gels must be placed into one transparent resealable plastic bag not over 1 liter in size.
3. Only one transparent resealable plastic bag per passenger is allowed onboard airplanes, which must pass the screening checkpoint.
4. Exemptions have been made for milk and soft food for infants in suitable amounts, as well as medicine with prescription label affixed for inspection at the screening checkpoint.
5. Passengers must separate the transparent resealable plastic bag containing liquids, aerosols, and gels apart from other cabin baggage, including laptops and jackets, at the screening checkpoint.
These recommended measures are expected to be implemented in Thailand as of 1 June 2007 onwards, pending the official announcement on security control guidelines restricting liquids, aerosols, and gels from Thailand’s Department of Civil Aviation.
The company requests the cooperation of passengers flying on THAI’s international flights to seek information on policies and regulations of the final destination country in advance of departure, carefully adhering to respective country measures. Particular emphasis is places on duty free allowances, which vary per country.
For more information on this matter, passengers may call Tel. 0-2356-1111, 24-hours a day. The company will provide further information in the future, should any new developments arise.
Taken from https://www.personalthailand.com/forums/20-Thailand-Transport website.