Question 1：

Is the bottle body single wall or double wall？
Answer：Single wall

Question 2：

Is it a thermos cup？
Answer：No，it is a ordinary stainless bottle.

Question 3：

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.

Question 4：

What is the bottle material？
Answer：
Cup lid：bamboo /no.304 stainless steel
Cup body：no.304 stainless steel

Packing list:

1 * stainless steel water bottle