Old lens cases are great for when you just want to take a couple of throws with you. The one on the left is a 100mm lens case and fits 3, the two on the right are 50mm and fit 1 or 2 with bubble wrap or foam in between each. Can be picked up pretty cheap on ebay and they are hard cases also.
Pretty legit! I’d be all over this if I didn’t pick up a MonkeyfingeR top 3 for that purpose… But then again, you can never have too many ways to transport yoyos