hm...i am a parent.
and when i found my oldest had stolen, what was much more worrisome than the stealing and drinking was the lying about it. the attempt to cover up.
wanting to save parents a worry is laudable, but when they already know and have the missing-alcohol-evidence in plain sight, it's more like involving everyone in a lie that will spiral if you keep denying.
if i suggested to you that they are already worried sick because they know, and that deny deny deny is you protecting yourself from consequences...what would you say?
if you can, speak the truth and you might get help and relief and support. find a way forward together.