Current bubble wand?

[Disney102015]

Random question - it seems like there’s always one bubble wand that you see everywhere throughout the parks. A few trips ago it was Mickey and last time I was there it was an Ariel wand that played Under the Sea. Are these the same ones being sold or is there a new one(s)? Just debating whether to bring the ones we have at home or plan to buy a new one. Thanks!