The Nalgene Easy Sipper Cap has been a revolutionary $2 purchase. Countless times I’ve gone to drink from my wide mouth Nalgene while driving or doing anything including standing completely still without putting 100% of my focus on the act of drinking and I’ve spilled water all over me. This accessory limits the area where water can pour out to about 1/6th of its normal size, limiting spillage and splashage.
