Wow what an overload of unidentifyables! Trick with Dalian is that the shapes are simple, there are no specialist glassmaker operations like added feet, ears, or clear casings. These items are mass produced and any further work will lower production and make them more expensive. In Muranese production this is less of an issue.
Saying that, I am not sure if these are all from the same source. The Nason items all have an intensive use of Aventurine, while the others use it more sparingly. Aventurine is expensive, splinters are rolled into the surface of the glass which should then be finished with care. High temperatures will burn the copper flecks so secondary oven operations are off.
There are definitely more glassmakers who have used this colour combination (Zwiesel, I think) , but Nason is by far the largest producer. In any case the label on the blue one looks very Italian - perhaps Laura or Svazzo can recognise it by the shape & colour.