Thermos only use food grade 18/8 stainless steel for all steel products and all products are free from BPA, BPS and asbestos.
We recommend washing all flasks by hand and not immersing in water for too long. To remove internal tea or coffee stains sterilising tablets are best.
Inside each product is a detailed care and use leaflet. Please refer to this for more specific information.
For maximum heat retention we recommend preheating all flasks prior to use. Fill with boiling hot water and stand for 10 minutes.