Lettering, numbers, pictures that are part of a cookie or cake itself. (It's all one dough).
could we say that "קיימא (permanence) applies to תופר in conjunction with gluing, taping, sticking, etc.
taking items out of the refrigerator removing raisins from kugel removing oil from yogurt removing juice from coleslaw
(Melting ice.) breaking the ice cubes to remove them from the ice tray; pouring hot liquids onto ice cubes (from a kli shieni);