Suddenly she came upon a little table, all made of solid glass. 

There was nothing on it but a tiny golden key, and Alice's first idea was that this might belong to one of the doors of the hall; but, alas! either the locks were too large, or the key was too small, but, at any rate, it would not open any of them. 

However, on the second time 'round, she came upon a low curtain she had not noticed before, and behind it was a little door about fifteen inches high. She tried the little golden key in the lock, and to her great delight, it fitted!

Alice opened the door and found that it led into a small passage, not much larger than a rat-hole; she knelt down and looked along the passage into the loveliest garden you ever saw. 

How she longed to get out of that dark hall and wander about among those beds of bright flowers and those cool fountains, but she could not even get her head through the doorway. "Oh," said Alice, "how I wish I could shut up like a telescope!  think I could, if I only knew how to begin."

Alice went back to the table, half hoping she might find another key on it, or at any rate, a book of rules for shutting people up like telescopes. 

This time she found a little bottle on it ("which certainly was not here before," said Alice), and tied 'round the neck of the bottle was a paper label, with the words "DRINK ME" beautifully printed on it in large letters.

"No, I'll look first," she said, "and see whether it's marked 'poison' or not," for she had never forgotten that, if you drink from a bottle marked "poison," it is almost certain to disagree with you, sooner or later. 

However, this bottle was not marked "poison," so Alice ventured to taste it, and, finding it very nice (it had a sort of mixed flavor of herry-tart, custard, pineapple, roast turkey, toffy and hot buttered toast), she very soon finished it off."