The best lid for a Nalgene Bottle is the Humangear capCAP+ lid . It adds an ergonomic narrow mouth drinking spout to any wide mouth bottle, providing the ease of drinking from a narrow mouth Nalgene while maintaining all the benefits of a wide mouth bottle. If you prefer a lid with a straw, the CamelBak Eddy+ lid is compatible with wide mouth Nalgene Bottles and has a flip-out straw with a bite valve. Like the capCAP+, the Contigo AutoSeal adds a narrow mouth drinking spout for ease of use. But instead of a screw-on cap, the AutoSeal has a self-sealing sip spout and push-button release that makes one handed drinking that much smoother. Narrow mouth Nalgene Bottles are more convenient to drink from, but wide mouth bottles are better for just about everything else — they’re easier to fill, add ice to, pour out, clean, and more.

While Contigo doesn’t appear to sell replacement lids, their lids work flawlessly with Nalgene Bottles if you happen to already have them. And no matter which lid you choose, it’s important to wash your Nalgene lid regularly to prevent mold from growing.If you’re lazy sometimes (like me), water bottle cleaning tablets can make it an easy, pain-free process. If you prefer to carry your bottle by a handle, the classic lid may not be the best option for you. Consider one of the other options on this list with a proper handle or make your own DIY Nalgene holder (some of which are a lot easier to make than you may think). Does what it says on the...well... bottle. Have you ever been really thirsty, opened your Nalgene and poured it too fast into your mouth - the water escapes from the sides andpours down your front? No? I must get some manners! If you have though - this will stop that happening. No need for pesky self control. This is one of the reasons my youngest son always chooses the narrow mouth Nalgene over the wide mouth to take to school. But I personally prefer the wide mouth because it's easier to clean and easier to put ice into.

And honestly, they’re good enough lids that it may be worth buying the entire bottle regardless (they cost about the same as many replacement lids anyway).

The classic Nalgene lid works great and is really easy to use and easy to clean. But, if you're anything like me, you might want to upgrade your Nalgene lid from time to time and have something more than just the basic screw on cap.

For being active, the Eddy+ is still my go-to straw lid, but for the office or lazy days around the house, a straw without a bite valve is a lot easier to drink from. From lids that make drinking just a little more convenient to lids that fully convert your Nalgene into a hands-free hydration system — there’s a lid for everyone. Similar to the AutoSpout, the Contigo AutoPop lid has a push button release. But instead of a pop-out straw, it has a pop-off cover over a narrow mouth drinking spout.

It's also much harder to clean Nalgene wide mouth bottles. Just yesterday I threw my wide mouth Nalgene full of caked on 3 day old smoothie into the dishwasher and it cleaned it perfectly. You can't do that with a narrow mouth Nalgene. Now you may be asking yourself, why don’t I just get a narrow mouth Nalgene instead of a wide mouth with a capCAP+ lid? And lastly, we have the classic Nalgene lid. It’s simple, durable, easy to clean, and much less likely to grow mold than most other lids.