It's a replacement cap for a camelbak bottle, so I'm sure you're already familiar with the product, just replacing it because you lost the other or it broke, it's a great product at a good price from moosejaw as always.
If you're headed into colder climes, replace the straw flip top cap w/ this cap...the rubber nipple on the flip top version will freeze and leaks the slightest bit. This doesn't leak and fits either your camelbak or nalgene bottle. Only word of warning...tie a parachute cord to it so you don't drop it down the side of the mountain and have to buy a new one!
96 hour sale prices are only good on in-stock items and cannot be applied to prior purchases or combined with other promotions. Not all items from selected brands will be on clearance. Sale includes discontinued and prior season styles and colors from select brands. The code excludes GoPro, Snow/Wake/Skate brands, including Burton, Volcom, Liquid Force, Foursquare, Analog, Sessions, Oakley and others. Exclusions apply. Prices are while supplies last and are subject to change. Sale ends March 9, 2014 at 11:59pm EDT.