I myself have mistaken many an oatmeal raisin cookie for a chocolate chip cookie,
but I have never heard of anyone mistaking rum raisin ice cream for chocolate chip ice cream.
Also, this story is pretty unique in how dumb and strange the characters act at times. I feel bad for Mayo for seemingly being the only sensible person in her friend group, haha (had she not been there, they would be "swimming" in the sink ). I quite like it though