Beautifly customized Pianoville tumbler!!  
 
Double-walled design: made of stainless steel material, our skinny blank tumblers are durable and double-walled, not easy to break or deform, can keep drink hot for over 8 hours, and cold drinks for iver 10 hours.
Multiple usages: these practical tumblers are in proper size, which will not occupy much space or cause much weight burden, suitable for many indoor or outdoor occasions, portable to be applied for home, office, travelling, camping, hiking, picnic, beach and other places, you can enjoy drinking without other concerns