I could only laugh when I read the blurb from Canadian Tyre and Canadian National on their 'World First' 60ft intermodal container.
Touted as being delivered in late 2015, and in operation in 2016, the time frame is comparable to the prototype Sadleirs 60ft container RCS 6301 which was on rail in Australia in late 2015.
Despite the close timings beween the Canadian Tyre and Sadleirs container, there is no doubting that FCL (now Linfox) led the way with the first 60ft container. While I can't find an exact date of manufacture, I have found evidence of it from 2004 and my photos are from 2011 when it was converted into an office space at Parkes NSW for Transtank (which closed in 2016 and the container is no longer on site).