Its called Tonka Tinys, supposed to be tiny versions of their most popular children's vehicle toys. The ones I got came in a 'mystery garage' is the boxes that are linked together and they can be stacked. IMO they EASILY can be shipping crates for ports or railheads. And for how I mount BA I can put two points/squads inside . . . or even some IWM vehicles. Good for surprise fun!
The mech is a Axeman, we use the Hotmatz so the hex is 1.75" . . . since its a semi-framed fire truck, I think it works. You can see a unpainted Schilitron in the background.
I found the item in Walgreens, so it was not the cheapest place to buy (looking for another GotG Milano). Trying to see if I can find a cheaper option, some of the Tinys are sold as sets it seems, like Fire & Rescue or Construction.