If the top bottle is full, the water can push out a bulge in this surface to form a bulbous drop, which then drips into the lower bottle. When the water is not rotating, surface tension creates a skin-like layer of water across the small hole in the center of the connector. If the bottles leak when you are using them, use a paper towel to dry off the area where the mouths come together and apply more hot glue there to obtain a better seal. (Note: the hot glue will dry very rapidly, so be sure to insert the PVC pipe as quickly as possible.)Īpply a small ring of glue around the top of the mouth of the same bottle (some of the glue will get on the PVC pipe, but that's okay), then immediately push and rotate the empty bottle onto the end of the pipe until the mouths of the two bottles meet (or come as close as possible) to form a glue joint.Īpply some additional hot glue to seal the joint where the two bottles meet.Īfter the glue dries, proceed to the To Do and Notice section. For effect, you can add a little food coloring or some bits of paper or glitter to the water.Īpply a small ring of hot glue just inside the mouth of the water-filled bottle, then immediately insert one end of the PVC pipe into the opening, simultaneously pushing and twisting until half of the PVC pipe is in the bottle. Circle water bottle full#
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