Got one of these at Xmas last year.
http://arborfab.com/store/brewing-filters/glass-carboy-dry-hopper/Works well, very well, however it only holds about 2.5oz of hops (provided you tap down the hop pellets to compact them a bit). While dry hopping my Amber Rye IPA, I filled it full of Mosaic (plan was 2oz of Mosaic and 1oz of Zythos for 7 days), since it would only hold about 2.5oz, I filled it completely with Mosaic, figuring I would fish it out to empty and put some Zythos in it.
That proved to be futile as there is no fishing it out without 1. either making a mess, or 2. screwing up the beer.
And since my wife has said no to any more equipment purchases until Xmas (unless it is an emergency), then I will have to wait to get more of these at Xmas.
So...what do you use to dry hop your beers in a carboy? I had some left over steeping bags from beer kits that specialty grain went in, I just soaked them down with sanitizer, added the hops, rolled and squeezed through the top of the carboy. Figured since I couldn't get the tube out, that I could add more hops than what the tube held, so another 2oz of Zythos, and 1.5oz of Mosaic (approx.), and will leave it for another week.
Anything else one can use to make it easier to insert dry hops? Don't want to just drop them in for obvious reasons.
I suppose many of you with kegs don't have this problem as it is a much bigger opening in a keg to drop a steeping bag full of hops into the beer, but us mere mortals that still bottle don't have much choice!!