It's taped together with clear packing tape. The bubbles are on the inside and covered with packing tape, then the tape forms the sides. The body and flap are one long piece of bubble wrap.
As for keeping it away from bubble poppers that's the hard part. I used the big bubble wrap because it takes more effort to pop and people start to pop and the nice ones catch themselves. If I'd have used the small they would have popped it before their brains Came on line. Lol