If you do not use disposable collection kits and collect with the latex liners directly, you’ll need an adapter as a fitting between the latex A.V./liner and the collection or baby bottle. The two variants we offer (depending on the type of bottle used) are both designed to have the latex outlet of the A.V. stretch over the end and are threaded to screw directly to a baby bottle (#632300) or collection bottle (#632305). The A.V. Bottle Protective Padded Cone (#500520) is an option that fits over the entire collection bottle assembly for both holding the bottle in place and maintaining temperature of the collection. This padded cone simply slips over the collection bottle and is pulled over the end of the A.V.