With orders of $25 or more, Amazon offers Prime members the
Greenscapes Tree Watering Bag for
$5.48 with
free shipping. (
Walmart offers it for the same price via pickup.) That's the lowest price we could find by $5. It holds up to 20 gallons of water.
Note: This item is part of Amazon's add-on program and can only be purchased with orders of $25 or more.