I use a 150ml Paterson graduate. I decant the syrup into plastic bottles that originally held 250ml of contact lens solution. You can prise the top off to do this. The bottle must be be clean and DRY before filling, as water causes HC110 to oxidise. The fine tip of the bottle allows you to squeeze the syrup out in a very controlled way. I tend to use a variation of Dilution E, by making it 1+49, rather than the proper 1+47. This makes metric dilutions far easier as the graduate has 10ml divisions. I put the syrup in the graduate, half fill with water, then stir to dilute all the syrup into the water. I then use the rinsing out method mentioned by others. If you stir the first dilution well enough, the remaining water easily cleans out the graduate. I use the times for Dilution E, but have adjusted, as I would normally, until I get the desired negative quality. 10ml makes 500ml for 35mm or 120 in a tank and 20ml does 1litre for a MOD54. It is wise to stir the fully diluted developer again before putting it in the tank, just to make sure it is completely mixed. I've tried syringes and pipettes, but was never convinced that all the syrup came out.
Alex.