Saying She's Wrong When She's Right

This is a tough one, and one that you should save for last. With your dog already firmly planted on the correct container, gently pull her away. Apply enough force that she must choose to resist you, but it should be physically very easy for her to do. Initially, apply pressure directly backward, so that opposing you will push her nose right back into source, which you will reward handsomely. Once she is firmly planted and absolutely won't go anywhere with you, you can repeat with very slight side pressure.