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for making this rubber bulb pump you would of course require a rubber bulb, a film can,
a coin, a pen body and a stiff straw. now first take the film can and make a large hole
in the base and small hole in the body for the water to come out. then drop a coin in
the can. this coin covers the hole completely. this coin will act like a valve. now fix the
stiff straw as delivery pipe for water to come out. now take a small piece of pen and
push it in the rubber bulb. make a hole in the can lid and fit this pen piece into it.
now place the lid on the film can and your pump is almost ready for your use. you can
see that the coin is covering the hole on the suction port. this coin will act like
a valve. now place this pump in a glass of water and squeeze the bulb and release it.
after a few turns the pump will get primed up and large quantities of water will gush
out. its a very delightful pump.