That takes me back about 50 years!
Ha, this reminds me of when I was a kid and sometimes went out with dad on a Saturday doing line testing as the 'navvies' (Irish labourers mostly from the term 'navigator' for ditch digger etc) laid new telephone cables.
I got to help make tea in a teapot about 400mm (16") across with stout handles at the front and back so that you could pick it up and pour it.
Full of water bought to a seething boil, a packet of tea (Typhoo iirc) half a bag of sugar and a lot of milk.
Everybody had strong, sweet tea with milk and liked it! :-)