what are these called?

So this is probably going to sound really dumb but what are those things called that you can buy and they hook to the side of your diaper bag to hold baby bottles? They little carrier things with zippers kinda like a little cooler maybe even? I just got my new diaper bag today and realized it didn't come with one and the side pockets will be used for my other two childrens sippie cups so I really wanna get one of the bottle holders. I've looked a few different places online and search for like "bottle holder" "bottle carrier" and so on but have had no luck :/

Idk, mine has one but I thought it was for wipes. It looks to small for bottles. Maybe try bottle cooler? Idk. Sorry I'm no help  

Target and walmart sell them in store. I thought they were called bottle coolers? I will see if I can link

Baby bottle cooler.

http://www.target.com/s?searchTerm=diaper+bag+bottle+cooler&category=0|All|matchallpartial|all+categories&lnk=snav_sbox_diaper+bag+bottle+cooler

or
http://www.target.com/s?searchTerm=diaper+bag+bottle+cooler&category=0|All|matchallpartial|all+categories&lnk=snav_sbox_diaper+bag+bottle+cooler

Like this? Just for 1 single bottle

They are called "bottle totes"