You can't ever have just one chip, one cat, or one kit-cat chip clip, so here's four cat-head chip clip designs to choose from...
Two dual-extrusion clips:
catclip_2color_lower.stl & catclip_2color_upper.stl
catclip_blank_face.stl & catclip_blank_eyes.stl
Two single-extrusion clips:
They are great for keeping you chip bags closed tight (although they might need a bit of training on how to stay out of the cat treat bags.)