Yep, use a syringe with a viton 'O' ring around the plunger.

But I use a squeeze bottle with no problems, simply squeeze the bottle, invert and immerse the tubing on the end of the bottle into the fuel and draw up only what you need.
Quickly reseal you fuel can and do not be tempted to decanter the unused fuel fron your squeeze bottle back into your main can.

A small help is to ensure that your inverted squeeze bottle's top is a contact fit over your fuel cans opening, that way very little ether can escape.
This in effect means that the main fuel can must have a small opening and your squeeze bottle must have a reasonable fit against it.

P.S. Doesn't Davis Diesel sell a small fuel pump bulb though?
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