Sloppy BBQ - You asked about the Weber chicken vertical roaster. Unless I'm misunderstanding the material I've seen about this gadget, you place the liquid in the cup the same as if ou were using a can. The bottom tray is etfffectively a drip pan. I'm sure that they work, but I think they're a bit overkill. For instance, here is absolutely no need to plug up the neck opening as Weber recommends. IMHO, it is too pricey for a roaster. You can buy beer can support holders at Wally World for $5. You can buy a ceramic vertical roaster from The Barbeque Store
all for less than the Weber unit.
My favorite is still he one I have from Outlaws Products. Too bad they went out of business.
Don't get me wrong, I'm ma big Weber fan, I just think they over-engineered this one, and overpriced it.