If you're looking for a little better solution to drinking from your wide mouth bottle, you need the capCAP.  It's two lids in one for your Nalgene, CamelBak or other brand wide-mouth drink bottles.

The wide mouth bottles are definitely easiest to fill or to clean.  And, they really add versatility.  But drinking from them can be a bit more troublesome.  The capCAP solves your worries by offering a small drink opening while still allowing easy access to the wide mouth. 

The green, rubberized small cap is easy to grip, even with gloves on. And the wide, rounded strap is more comfortable to hold.  capCAP is 100% Polycarbonate-free and 100% BPA-free. Both caps are made with FDA-approved food-safe polypropylene (#5) plastic.  Works with Nalgene 1L wide mouth, Nalgene OTG, Nalgene and Guyot SS bottles, Camelbak, Cyclone and Stansport.