Eiffel Tower Lemonade Crystals Last year, while helping to restore Gough's Orchard Lock in Stroud, I found a very small, square section bottle moulded with "Tower Lemonade" (no sign of the word Eiffel) i a heap of spoil excavated from the lock chamber. It still has its somewhat corroded metal lid on, and contains a completely clear, colourless liquid. It had been buried in spoil for who knows how many years (the lock was last used in about 1930 but filled in progressively ever since).