Take a look at these three suggestions from top designers such as Karl Laggerfeld, Alexander Wang and Martin Margiela.
Me, I think I still prefer the classic pony tail though lol
Chanel used chain necklaces not only as an accessory for the neck but also to hold the hair.
Alexander Wang opted for a beanie sweater with a hole where you can let the pony tail out. This one cracks me up! LOL
Maison Martin Margiela created coats with have built-in pony tail holders. To me the most creative idea of all.