I'm yet to test this.. but an idea occured to me yesterday as I was trying to balance a stack of CD sleeves on my desk yesterday as I was trying to tidy up my desk at home. The stack just kept falling over, as the sleeves just kept slipping from each other. On closer inspection the plastic CD cleeve material is kinda similar to a milk bottle.. but alot more slippery! And under load, by pushing them together the friction didn't seem to increase as it can with milk bottles. I'll be testing some out probably in the next couple of days as an instead of the milk bottles. The only thing down point to them is that they are very thin, so i'll be experimenting with them and milk bottle washers as well. Just thought I'd share with you all.
el
