Hi,
The vase that you reference in the first link was perfectly correct, in fact I bought it

However, it was something like 30 cms high (from memory). Sorry, but you cannot just tranfer the pattern from a vase to a drinking glass and then assume that the same company made a version in that pattern - it just doesn't work that way
The other link that you give shows a good Powell amethyst bowl accompanied by two continental drinking glasses. The rule here is, just like eBay, auctions are not necessarily accurate with their attributions!
Nigel