@lowtiki has released a very limited number of these (15 of this color-way) and only a few remain.
From LowTiki.com:

Hand sculpted, cast, and glazed in studio in the Pacific Northwest.
Super limited run of 15 mugs. This colorway will not have another edition.
The Mermaid mug measures approximately 7" tall and 6" wide and holds about 16oz of liquid. Each mug is done by hand so expect some variation. Mugs are made to order in a small studio so expect 4-6 weeks for shipping.