This 500 mL Pastel thermos from Qwetch is made of stainless steel (inner and outer wall), it has a silicone seal and is guaranteed BPA free.
It does not alter tastes and flavors.
It will keep your hot drinks for 12 hours and your cold drinks for 24 hours.
It is not dishwasher safe but you can simply wash it in soapy water.
Qwetch thus offers nomadic food containers for those who want to transport their drinks and meals without having to resort to disposable bottles and food packaging.