United Dairies Milk Tank

I took this picture at the National Railway Museum in York. My favourite museum ever. I share it today because, while I have seen many cargo trains in my life, I don't think I have ever seen a milk tank like this one. I mean, not on a train. I have seen similar things in the back of a truck, but never elsewhere. I wonder if they still transport milk by train. Anyway, I also share this picture to remind myself that trains are still used to transport goods. I mostly think of them as public transport.