This is a Holmegaard “Kluk Kluk” decanter identical to the one that appeared in various TOS episodes. In particular it appeared in the 51st episode "By Any Other Name" where aliens called Kelvins board the Enterprise and calcify most of the crew. Un calcified Scotty tricks one of the Kelvins, Tomar, into a drinking contest who naturally loses. It is from this bottle of evidently alien design that the two enjoy several drinks together.
This picture confabulates this bottle with one of Scotty's lines also from same sequence where he doesn't remember what liquor another bottle holds so instead declares "It's green!" (said with a strong Scottish brogue "gRReeen").
