So, you want leak-proof performance, durability, and reasonable cost from a water bottle. Look no further. You can find all of those features in this narrow-mouth Nalgene water bottle. It doesn't hurt to have more quality than you will ever need. And this bottle has more durability than you will ever need unless you work for your city's police bomb disposal squad and you like to sip from your water bottle while removing high explosives. Rest assured your bottle can survive a bomb blast in case you have a bad day on the job. Okay, it won't be an open casket funeral, but at least your family can reuse your water bottle after you're gone.This bottle does not have a sip spout. Therefore, it is not ideal for car use as it is not designed for one-handed operation. This bottle is not insulated, therefore, it holds a large volume of water for its size. Unlike the wide-mouth version of the bottle, this one is not as easy to clean. And you will not be able to put ice cubes inside. What it does have in terms of advantages over the wide-mouth are that it is easier to drink from the bottle directly, and the smaller the lid/cap, the more resistant the bottle is to leaking. Drinking from the wide-mouth bottle can get messy. Not so with this narrow-mouth. And, you can put carbonated beverage inside the narrow-mouth, shake it to your heart's content, and it will not leak. This is the most leak-proof water container that I have ever owned.I suggest that you also purchase an insulating sleeve for your Nalgene bottle unless you like your drinks at room temperature. The best insulators are the ones made by Nalgene specifically for this bottle. However, the ones made by Outdoor Research are also very good.So, what color should you get? I suppose it doesn't matter if you only carry water. However, if you like to mix Kool-Aid, Tang, tea, or any other types of beverage, the clear color helps. If you're mixing grape juice, for example, it helps to be able to view the color of your mixture so you can adjust the strength or the concentration. In other words, you need to be able to see how dark the mixture is, so you can judge whether or not to add more powder. The clear bottle will help you do this. For mixing beverages, it is important to be able to ascertain the actual color of the liquid inside. The tinted versions of the bottle will prevent you from accurately judging the color of the beverage inside.Clean your bottle after each use. You do not want molds and mildews growing inside. It will not be as easy to get it out as it would be in the wide-mouth. It can be done, but you may have to use bleach. This is an excellent beverage bottle that will not ever let you down. Should you purchase this narrow-mouth Nalgene or the wide-mouth version of the same bottle? My pick would be the narrow-mouth, simply because it is much easier to drink straight out of the bottle. With the wide-mouth, you may want to carry a small drinking cup to avoid spilling your drink on yourself. The smaller mouth also mean a smaller cap, which means a better seal against leaks. The narrow neck of this version also allows the insulated bottle sleeves to grip the bottle better, even after their elastics have loosened. The only disadvantage is that the inside will be harder to clean.Highly recommended.