THere are lots of nice bits of kit that you can use as water carriers/storage on site - Ortlieb, for example. But anyone used a dry bag as one? eg http://www.ebay.co.uk/itm/20L-Orang...590551525000710&_qi=RTM1066542#ht_3285wt_1096
I would say this is a good word of caution, about the food grade materials, we used a issue basha for rain catchment and the water collected was absolutely disgusting and did make me wonder how safe it was as it was to drink, obviously something either in the rain itself or something in the material that the basha was made of had run of the surface into the bottles. I don't know whether this is something that could effect drybags as well, the comments above suggest the issue hasn't come up up but its is worth thinking about.There can be problems carrying water in dry bags:
If you have a 20 l bag, don’t put 20 l of water in; it may not be able to support the weight of the water when you try and lift or carry it; so don’t fill them full.
The material and proofing used on the bag may not be “food grade” ?
Dry bags are intended to keep the insides dry. When you put water in them, say 5 l, you have a considerable pressure pushing on the fabric. Depending on the materials used and quality, you may notice water starting to push through the fabric and forming on the outside. I’ve seen one dry bag positively dripping with water escaping ! Perhaps it wouldn’t have been very good as a “dry” bag either; but these bags are often used inside a pack and are only ever required to be “resistant” rather than “proof”