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2. Suction cup - Wikipedia

   en.wikipedia.org/wiki/Suction_cup

   The working face of the suction cup is made of elastic, flexible material and has a curved surface. [3] When the center of the suction cup is pressed against a flat, non-porous surface, the volume of the space between the suction cup and the flat surface is reduced, which causes the air or water between the cup and the surface to be expelled past the rim of the circular cup.

3. Self-sealing suction cup - Wikipedia

   en.wikipedia.org/wiki/Self-sealing_suction_cup

   Inside the self-sealing suction cup, the plug is positioned close to the tube opening so that it can get sucked into the tube seal the hole when the central suction line is powered. A pair of springs connected to the suction cup's base helps maintain the plug's position, restoring the plug seal in the absence of object forces.

4. Cup holder - Wikipedia

   en.wikipedia.org/wiki/Cup_holder

   A cup holder is a device, such as a podstakannik (Russian) or zarf (Turkish), to hold a cup or other drinking vessel. It may be free standing to hold cups securely on a desk or other flat surface, or in a tree style to store sets of cups in kitchens. They may be built into automobiles or chairs, or fixed to the walls of airplanes, boats, buses ...

5. Plunger - Wikipedia

   en.wikipedia.org/wiki/Plunger

   For the common plunger, the cup is pushed down against the drain opening, either pressing hard into the drain to force air in or pushing down until the rubber cup is flattened. The cup is then pulled out, creating a vacuum to pull blockage material upward and dislodge waste or other material.

6. Vintage Depression Glass Worth Wallet-Shattering Prices - AOL

   www.aol.com/vintage-depression-glass-worth...

   Produced from 1930 to 1934, Hocking Cameo Depression glass features intricate scrollwork. The combination of soft, frosted designs and smooth, clear glass gives Cameo a sophisticated, ethereal ...

7. Pythagorean cup - Wikipedia

   en.wikipedia.org/wiki/Pythagorean_cup

   Cross section of a Pythagorean cup being filled: at B, it is possible to drink all the liquid in the cup; but at C, the siphon effect causes the cup to drain. A Pythagorean cup looks like a normal drinking cup, except that the bowl has a central column in it, giving it a shape like a bundt pan. The central column of the bowl is positioned ...