best stainless steel travel mug 1. 400ml plastic travel mug, 2. food grade plastic, 3. high quality, lower price ... and selling of stainless steel flask , travel pot , coffee pot , sport bottle , vacuum pot , travel mug etc. series have been sold ... , become a trusted partner to create bright future together . 400ml Double wall best stainless steel travel mug Capacity:400mlMaterial:shell/ Inner ...