Most is common knowledge...there is NO secret..that is the secret...*LOL*
Yh'a ,Tval bricks are VERY common in the transportation industry ,(truck ,rail,and air - that I'v experienced) . it is an off the shelf ,cheap product . tho'w WG/Elite being known to just love playing with new technology .

Heck ,i had several Tval loads in my 1st year as an inexperience truck driver .in my case ,most of them where 'no freeze guarantee' loads in a heated trailers . a service that in my own opinion can be capture more by Expedite carriers .