Embodiments of the inventive technology disclosed herein may improve efficiency of conveyed bottle apparatus by providing bottle jam prevention guides that may be rotatable, whether freely or in response to a motorized force. Such guides may force downward a bottle that undergone excessive swing in a forward and/or rearward direction, and thus has jammed or is in an incipient jam condition. Advantages may include not only increased efficiency of a conveyed bottle process, but also reduction or even elimination of chatter.