ムーミン ペアマグセット MM700-13

The item you're referring to seems to be a Moomin pair mug set. Moomin is a popular character from a series of books by Finnish author Tove Jansson, and it has inspired a range of merchandise, including ceramics, clothing, and more.
The specific item code you provided, "4979855319062," likely corresponds to a particular model of Moomin mugs, identified as "MM700-13." This set may feature designs based on Moomin characters and be marketed towards fans of the series.
If you're looking for more specific information about the product, such as where to purchase it or details regarding its design, let me know!