Frequently Asked Questions

Please see our list of Thermos® counter locations in Philippines here.

Please fill in the contact form here

Please contact the following: 

Advanced Electronics Service Corporation
412 Amang Rodriguez Avenue, Manggahan, Pasig City
Tel. No. (632) 217-8026
Telefax (632) 681-6166

Thermos® products are manufactured at our Thermos® factories located in Philippines, Malaysia and China.

All Thermos® products are manufactured with 18/8 grade stainless steel, or grade 304 stainless steel. The parts are made of polypropylene (PP) and silicone.

Yes, all Thermos® products use food-grade safe materials and are BPA-free.

All Thermos® products use double wall vacuum insulation technology to keep your contents hot or cold. For best results, please ensure the starting temperature of your content is hot (or cold) enough, filled to maximum capacity, and the lid is properly closed.

If the exterior surface is extremely hot or has condensation and with no seen damages such as dent or puncture, please email a photo of your product to and the team will respond to you within 7 working days.

Most Thermos® products are leak-proof. Please check that your product is not overfilled and all silicone parts are intact. For best usage, do not overfill contents to the rim but leave a 1cm space between the tip of the stopper and the contents. If the silicone gaskets are taken apart for washing, please make sure that they are assembled correctly to prevent possible leakage.

We strongly encourage rinsing your Thermos® product immediately after use, to prevent accumulated stains. Air dry or wipe dry all silicone parts to eliminate any remaining moisture that may form mould.

We strongly encourage washing your Thermos® product with a soft sponge and gentle dish-washing soap.

We would not encourage customers to place Thermos® stainless steel vacuum insulated parts and straw set in the sterilizer as it may result in product discolouration, paint peeling and deformation. Hand washing is recommended for best results. 

We would recommend the following cleaning method to aid in removing the rubber smell, or watch it in action here



  • Water
  • Vinegar


  1. Detach the silicone parts, mouthpiece and stopper from the product’s body.
  2. Fill a bowl with vinegar and water with a ratio of 1:10.
  3.  Soak them into the bowl for 1 to 3 hours.
  4. Rinse thoroughly and wipe dry with a clean towel.


We would recommend the following cleaning method to aid in removing the tea/coffee stains,



  • Baking Soda, 1 tablespoon
  • Hot Boiling Water 



  1. Place baking soda into the tumbler/mug and fill it with hot boiling water.
  2. Place the silicone ring and silicone gasket into the tumbler/mug.
  3. Close it with the lid and set it aside to soak for 1 hour.
  4. Discard water. Rinse and wash tumbler thoroughly with a soft sponge and gentle dish-washing soap.

The appearance of the "rainbow effect" discolouration is non-toxic, and can be easily removed by soaking or rinsing with white vinegar. For best maintenance, we recommend cooking with medium or low heat to prevent damage on the stainless steel.

We would not recommend to store milk and fruit juices into a vacuum insulated product as these beverages are meant to consume when fresh.

Yes, the vacuum insulation technology in our Thermos® sports bottle and straw bottles can keep contents warm. These products are labelled 'cold insulation only' to prevent accidental scalding, due to the special spout and straw design.

It is common to experience difficulty opening some Food Jars, because when the Food Jar is filled with hot liquids and secured in a vacuum space with a closed cover lid, the hot steam from the liquid causes some air pressure that results in the difficulty of opening the cover lid.

We would recommend the following methods to aid in opening:

  • Set aside the Food Jar to cool down the hot beverage for at least 1 to 2 days. The cover lid should open easily, after the contents are cooled down.
  • Alternatively, speed up the process by turning the Food Jar upside down and soak only the Food Jar’s cover lid into a bowl of hot water, for 1 minute.(Note: Do not soak the entire product into the water. The process may affect the quality of the heat insulation function.)

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