I was afraid that this was going to be an "assorted" box where you can get any design of the 6, but luckily this is not the case. Each one is packaged in it's own box so you could easily re-gift one no problem.

No extra straps either, just the 6 designs as shown. At about ~$5 each, it's a solid deal since you're guaranteed all 6 Vocaloids when most blind box straps/keychains go for $7-11 depending on where you're buying it.