Hi,
When I add hops to my kits I tend to use a (very clean) 1.8l Cafetiere, as it is ideal for making the 'hop tea' that OSB mentions in his post...
If you dont have one it might be worth buying one cheap from somewhere like wilko's or TKMax, they really are almost ideal for the job- made of pyrex and having an inbuilt filter (designed for coffee grinds which are alot finer than hops).
Mine is large enough to add 30g of hops at once and still have room for more than 1.2l of hot water.... I removed the small plastic 'fine' filter as I found it made it hard to press down to get the last of the 'tea' out...
It helps to keep the hops (especialy the flowers, if you use whole hops) out of your beer when you transfer the 'tea' to the FV.
Just remember to put a small amount of hot (not boiling) water in it while you weigh out your hops-stops the glass from cracking & pre-heats the pot so the hop tea stays hot for longer...
I usually add 15-25g of hops (depending on type or the hopiness I'm after)to 1-1.5l of hot water, stir with a sanitised spoon then put the lid/filter on but dont press down (YET)
Cover with a clean hand towel to keep it warm & leave for 20 mins (depending on how strong you want your hop tea)
Press the filter down after the required amount of time and add to either the empty kit can (to rinse) or directly to the FV and brew your beer in the usual way.
I find this particular way is good for adding Saaz hops to Lager kits... There may be better ways but I find this quick, clean and reliable.

Slainte!
