How should this be named to make it clear to another developer what is going on. ( Related: http://stackoverflow.com/questions/18481599/replicating-constructors-and-new-with-object-create)

objects.js

var app = app || {};
// This is the 'model / sigular'
app.Bottle = {
    someFunc : function () {

    },
    someOtherFunc : function () {

    }
};
// This does something with all 'Bottle' hence Bottles.
app.Bottles = {
    current : [],
    create : function ( elems ) {
        for (var i = 0, len = elems.length; i < len; i++) {
            this.current.push( Object.create( app.Bottle, { 'elem' : { value: elems[ i ] } } ) );
        }
    }
};

@rlemon I am more interested in the naming at the moment, rather than usage. Is it clear that app.Bottle and app.Bottles are related?

FWIW, it's clear to me that they're related. It's not clear that you shouldn't use Bottle without using Bottles, though. If you want to do that, make it impossible to create Bottle on its own by adding a factory method to Bottles or some such.

Note that using an underscore on a property doesn't make something private. It does nothing at all other than suggest to someone who uses the same convention that it's meant to be private. You can have truly private properties if you want them (in a couple of different ways), more here.

Perhaps you could place app.Bottle into a subgroup where it is understood that it is a model i.e. app.Model.Bottle.

@mikedidthis then app.Bottles.Bottle is fine.