Is the bottle body single wall or double wall？
Answer：Single wall
Is it a thermos cup？
Answer： No，it is a ordinary stainless bottle.
Is it safe ？ Is it bpa free？
Answer：Yes ，it is safe ，I have the test creatificate，if you ask for it ，I can send the photo of test creatificate.
What is the bottle material？
Answer：Cup lid：two style design，one of them is no.304 stainless cup lid，the other is bamboo cup lid and no.304 stainless
Cup body：no.201 stainless
Packing list: 1 * stainless steel water bottle
