This is a large modernist decorative art glass. It has an applied engraved signature on the base so that the vase resembles a studio work. But I do not think that the name relates to a Lithuanian maker - very strange!
My large vase looks like similar in design and form to other Glass Nuvo vases or bowls made in Lithuania. It would have originally had a "Glass Nuvo" sticker on the side - this is no longer present.
It is certainly a good decorative piece and well made. The exterior have abstract shapes and the colours are flecked with little black lines or dots. The main body colour is a Royal Blue with yellow at the top - and running vertically across the main body are random shapes of dark brown glass. The interior is white. The vase is very thick and has a good bit of weight to it.
A nice large piece - measuring 8 inches in height - with a width of 12 inches and depth of 7 1/2 inches. It weights a stonking 3.7 kg in weight - so the size and weight will push up your postage costs - I will try and send for the safest and most economical way that I can.