Tie a bottle to a rope, and then loop the rope around a pulley that's hanging from something. Pull on one end of the rope, and the bottle goes up. Pull the other end and it comes down. Presto! You have a simple conveyor to move a bottle up and down.
Look; we're all willing to help you here, but at least draw a sketch of what you have in mind so that we can advise you. You should at least have in mind what you want to achieve, if not how to achieve it. Tell us, and then we can help you. If you expect us to do everything for you, then you're going to be sorely disappointed.
Then again, I did tell you how to make a very simple conveyor. Think your lecturer will pass you for it?
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If only you knew the power of the Dark Side of the Force
That's okay, any dog that annoys me somehow always ends up being strangled to death, even though nobody ever seems be anywhere near them when it happens.
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If only you knew the power of the Dark Side of the Force