Does anyone have a cream whipper? I saw some on cooking.com and there were three brands, ISI, Liss, and another one. I also checked e-Bay, and there are Whip It brand on there. This time of year, I am craving hot cocoa, lattes, and other hot drinks, and instant whipped cream would be great. Any input would be appreciated before I shell out $50, I want to make sure I know what I'm getting.