Wow, it is brilliant just talking to someone who has inside knowledge. I suppose that it could be a generic term for glass oddities.
There are acutally more items than I quoted, here is the whole list that he states is
"such things as baskets, dogs, paperweights, piano insulators, linings for the plating trade, candlesticks etc"
The book is very thin and is probably more of a piece of marketing rather than a history because he concentrates on what the company did for WW2 and afterwards. Also, the pieces of glass that they have photographed are things that I would not associate with Davidson and in fact look a lot like Whitefriars!
Thanks for all your help