When a running friend moves away, a useful farewell gift can keep one familiar part of the friendship close. A mug joins the everyday routine; a photo display keeps a particular memory visible.
The distinction is not practical versus sentimental. Both can be personal. Choose the one whose design and use already belong in the friend’s life.
A mug for an acknowledged chosen-sister friendship

Chosen-sisters friendship mug
The chosen-sisters wording belongs to a friendship that already uses that affectionate language.
The 11 oz friendship mug carries Best Friends Are The Sisters We Choose For Ourselves wording, illustrated friends and names. That makes it especially suitable for women who already describe their friendship that way.
The names add individual recognition, while the fixed sentiment does the emotional work. Keep the text concise: the seller notes that long lines shrink to fit and all-uppercase cursive can be hard to read. A simple name is more useful than squeezing the whole running history around the cup.
A photograph when the wording is not yours

Flat photo building-block display
A shared photograph communicates the friendship without requiring a particular relationship label.
A flat photo-block display can carry a clear shared picture without assigning the relationship a particular title. Choose a horizontal photograph that explains the connection: two friends on a familiar route, or the group at a moment the recipient loved.
The picture is printed across interlocking blocks, so it remains a photograph rather than becoming separate figures. This works well when the friend would enjoy a small memory in their new home.
Choose the mug if the chosen-sister phrase feels natural and the recipient already has a daily tea or coffee ritual. Choose the photo block if one image says more than the fixed message, or if the friendship does not fit that wording.
See the chosen-sisters mug or choose a shared-photo display for the part of the friendship you want to keep nearby.