Rusty Hinge 2 wrote:

If you have any food manufacturer who is likely to use orange or lemon
concentrate/pulp, you can usually get huge screwtop black polythene
bottles for a small amount. (They tend to sell at auction for between
ten and twenty pounds each.)

Example at http://www.users.zetnet.co.uk/hi-fi/ad/squashbockle.jpg

Two or three of those would be absolutely perfect, I reckon. Now to
work out who might be using them...

james