Yes. The nipples are what let the water out.
however, they aren't long enough to go through the cooler wall. They are intended for use in relatively thin plastic...generally no thicker than a regular bucket. Someone came up with these adaptors - to use with the nipple drinkers - so they can be used in thicker walled items such as coolers.
All this nipple drinkers talk tax:
Delilah 'sampling 'the tarp on their mobile coop
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Really girls? I know you like to work together, but isn't it too hot to be scrunched on one box? 2 moms plus 9 3+ week olds is just too much in this heat!
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