I've been using those Spirited Shipper boxes for years. They are dumb expensive for cardboard (imagine how much cardboard you just throw away weekly from amazon... why is SS cardboard so pricey?). They are a little cheaper if you buy them on amazon instead of direct from SS.
I took a good look at those inflatables you used. I might just switch to those. The first year I used those SS boxes, a couple of the recipients reported broken bottles inside.
Yeah, the SS boxes worked great for me. The issue for me is that I was only going to buy enough to ship 30 bottles so the shipping was as much as the product!
What was nice about SS is that they came with both the holders and the outer box, so you truly have everything you need. As you all saw, I had to use some extra packing materials to take up the excess space around the inflatables and pad the bottles.