Expanding Foam

We are crossing the Madigan Line in the next couple of weeks and our favourite beverage only comes in glass bottles, driving around for the last week with a carton in the rear has nearly driven me nuts, just on the bitumen.

So I bought a can of expanding foam and leaving the bottles in their cardboard carriers I sprayed some expanding foam into the bottom of each six pack so as to let the foam expand inbetween the individual bottles.
Seems to have worked very successfully. The six packs go back into the original carton and no more rattles.
Can do exactly the same with the empties as we drink them and put back into the carton when empty.
Just thought I would share this idea as other people must have the same problem. I'm sure it has been done before but I haven't heard of it.

Cheers, Peter