Guyot Designs SplashGuard
I have two of these. I put them in my 3L Nalgene collapsible…
Price Paid: $1.50
I have two of these. I put them in my 3L Nalgene collapsible canteens. They make it a lot easier to pour when you are only able to use one hand on the canteen due to the flexibility of them (less spillage of clean or filtered water). For the price you can't beat them.