I used to go to the hardware/industrial supply store and hunt around until I found some "o"-rings that would fit inside the sealing area of the screw on top. They aren't made from food-grade material however. It works for awhile, but eventually they leak again. I think hand washing them makes them last longer than anything.
AG
There are 3 loves in my life: my wife, my English mastiffs, and my weightlifting....Man, my wife gets really pissed when I get the 3 confused...
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