Check the listing for details. NATHAN 1.6 Liter Hydration Bladder New Sealed In Box. Color: Clear, Condition: New with tags. Listed at 19.99 USD. The NATHAN 1.6 Liter Hydration Bladder is a new, sealed product designed for outdoor activities such as hiking and running. This unisex bladder by Nathan comes in a clear color and is specifically designed for a 1.6 liter capacity. The model is called Intensity, and it is not treated with insect repellent. Perfect for staying hydrated on the go, this hydration bladder is a reliable and practical choice for any adventure.The NATHAN 1.6 Liter Hydration Bladder is a new, sealed product designed for outdoor activities such as hiking and running. This unisex bladder by Nathan comes in a clear color and is specifically designed for a 1.6 liter capacity. The model is called Intensity, and it is not treated with insect repellent. Perfect for staying hydrated on the go, this hydration bladder is a reliable and practical choice for any adventure.