I have the small petflys carrier. I should think it could carry two of that size no problem. It isn't flimsy, but you could definitly push the top down to fit under a lower seat if you needed to. it doesn't have a metal frame or anything like that. It's pink and I've decided I absolutely can't use it for Tucker, so If you'd like to make me an offer please feel free
I have everything that came with it, even the id tag, the extra carry strap (one so it's hand held and the other to put over your shoulder) the blanket that matches the interior, and even the original hang tag
It's in perfect condition except for this weird little strap that is designed to hold the front flap half closed and half open. I don't know why anyone would ever use this strap to do this with the flap, but it got caught on something and is torn. You can see in the pics.