In the spirit of recent deals under $1 I present 50 cent collapsible bottles at Big W Endeavour Hills, not sure if other Big Ws have it, but there were heaps of them when the photo was taken.
Imagine, tree fiddy can buy you a few Ikea umbrellas to fight of the damn Loch Ness Monster and the bottles will allow you to replenish yourself.
tree fiddy :-P