We are now carrying BPA free pouches for water and wine saving. They are collapsible and compared to a hard bottle of equal volume, they weigh 80% less and take up a mere one fifth of the space when empty. Also they are cheaper than the Camelbak bottles. The wine saving pouches fit a full bottle of wine. They can be used to save any portion of your bottle of wine for weeks (because you can squeeze the air out of the pouch) or to carry wine into places that don't allow glass.
You will find them hanging in aisle 2 above the seltzer and juices.
For details on the company and their products go to http://cascadedesigns.com/platypus/water-bottles/category