That's exactly what vin had made...
Like everyone else used money bags and pillow cases ,,for years,,never fell over and squashed one....
Here's a tip,,,mind I do this even when there going in the box,,,wake them up 10 mins befor you bag or box them,,,so they have gone toilet,,,
Rew off this site has a bucket that has lid,,,it's a big protein powder tub,,,bit like one of them 10 litre paint pots,,,,that fits in the bottom of his rucksack ,,,and cost feck all,,load of air holes bobs your uncle