I haven't seen it personally, but it looks like it's the counter table.
http://moridb.com/items/furniture/counter-table
If it is that, then I think it's a Welcome Amiibo update item, through the RV park. You can get it from Bea's, Ellie's, Mabel's, and Sylvana's RVs, if my infer is correct.
Hope this helps!