Survivor Filter Collapsible Canteens (33oz) 2 Pack (2L Total) - Durable Carabiners and Handles. Squeeze Water Through a Filter or Use as Water Bottles. Light and BPA Free. SCREWS INTO YOUR SURVIVOR FILTER (Sold Separately but get Canteens for 20% Off When Purchased with the Survivor Filter on Amazon): Allows you to Squeeze Clean Water through your Survivor Filter with Ease. ULTRA STURDY CARABINERS AND HANDLES: The Survivor Filter Collapsible Canteens are 33 ounces (1 litre) each and allow you to quick fill from any Fresh Water Source. BPA FREE AND EASY TO CLEAN: Its also Eco-Friendly, Reusable and Refillable. Comes with a Push-Pull Cap to Protect the Mouthpiece from Dirt and Damage. Saves Space and is the Perfect Addition to your Survivor Filter in your Bug-Out-Bag. STANDS UPRIGHT AS A WATER BOTTLE WHEN FILLED: Lightweight and Easy to Carry. Can be Folded, Rolled up, Flattened or Attached to your Survivor Filter or Backpack. SURVIVOR FILTER MONEY BACK GUARANTEE AND LIFETIME WARRANTY: if you don't love your Survivor Filter Collapsible Canteens, simply return it and we will refund 100% of your purchase. For a Limited Time, get our new 2 Pack Hard Sided Water Bottles for 50% off with Purchase of the Canteens.