It is a silver cup with a handle in the shape of a horse from a rich burial of a Sarmatian leader of the 1st century. This burial was found in 1984 in the mound village of Porogi, Vinnytsia region under the leadership of B.I. Lobai.
Original source: https://vinnytsia-museum.in.ua/gallery/sarmatians
Кубок. Срібло. Exploring Ukrainian Cultural Heritage Online, accessed December 7, 2023, https://gallery.sucho.org/items/show/177