1) Thicker high quality PP body and lid, 304#(18/8) stainless steel ball.
2) Single wall can't keep liquids hot or cool for long time.
3) No leaching and toxin free. 
4) Re-usable & Durable. 
5) Streamlined to fit into rucksack, briefcase. 
6) Used for: office ,coffee, travel , auto mug and advertisement sales promotion best choice
7) Silkscreen printing or laser engraving logo as customers' requirement.
8) Our monthly output reaches in 100,000pcs above for one type.