Tomatoes need calcium to achieve their full flavor potential, and calcium is often greatly lacking in our soils. 95% of a dry eggshell is calcium carbonate. When planting your tomato plants crush up (to powder) about 4 or 5 egg shells and put them in the bottom of the hole. Then plant your tomato on top. They'll provide calcium and prevent blossom end rot.
Wine Bottle Planter - The idea is simple: the sunlight warms up the air inside the glass and expands. The heated air is pushed through the bottle neck into the soil warming it, and the plant growing in the soil.