シャンプーがなくなったよ。

shampoo

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to be lost (e.g. luggage); to be missing; to be used up; to be run out; to be exhausted; to be consumed; to be reduced to zero; to not occur any more; to disappear (e.g. pain); to be lost (e.g. a dream, confidence)

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!