... 3042.Double walls stainless steel and high vaccum make it insulated from outside,can keep warm or cold for about ... with hammock makes it more convenient and beautiful.7.The flask can be spray painted in any color.8.Logo ... preservation cup,stainless steel vacuumvacuum cup,tour flask,wide mouth flask,student flask,sports bottle,etc. 350ml unbreakable double walls stainless steel bottle insulated flask