It has been almost 20 years since the word “tumbler” first landed in Japan and became completely established. This distinctive double-layered drink cup with a lid came to Japan with Starbucks, and became well known as Starbucks stores spread throughout Japan.It was around 2004 that we started developing such tumbler products under the brand name Rivers. (You may think it is too little known for that, but that’s another story.) Now, for the first time in a long time, Rivers is coming out with a new tumbler product. It is the “Wallmug Shade” made of vacuum stainless steel. – Material：Stainless steel (body, lid) / polypropylene (lid) / silicone rubber (lid)– Capacity：300ml– Weight：Approx. 199g– Heat retention：78°C or higher (1 hour), 42°C or higher (6 hours)– Cold holding power：5°C or lower (1 hour), 10°C or lower (6 hours)– Size：W81mm x D85mm x H141mm
