Boy, people sure have different opinions of "must have".
the plastic wrap here is perfectly acceptable to me, and they sell cheap tupperware at most every neighborhood housewares store.
And if you MUST have the best tupperware, there is a Tupperware brand boutique on Cabildo right around Olleros, which sells name brand Tupperware in a store that presents it as if it was Louis Vuitton or Prada. Probably priced similarly, although I didnt look.
Me, I bring good single malt scotch or american small label bourbon.
Both are hard to find here, and fiendishly expensive.
In Washington State, where I am from, we have some of the highest liquor taxes in the USA- and I can still find good single Malt for $25 to $35 US. The few brands that are here, like Talisker, are $300 to $400 pesos or more.
And I have never seen things like Knob Creek, or Bulleit, or Basil Hayden bourbon here, at any price.
I also bring US CD's for my Porteno friends- imported US CD's can be as high as $140 pesos, which was the price I saw today at Miles for a Russell Gunn CD that is available used on Amazon for $2.96 US. IF the CD is even available here- many are not.
So I take orders from friends- recent deliveries have included the Waterboys, Bruce Coburn, and Tom Verlaine, all completely unavailable here.
I brought a tiny grater, for the ginger in my morning fruit liquado. Argentine graters are crummy, especially small ones.
I will be bringing a small Braun coffee grinder next time- 220 volt is available from the exporters in LA who sell to sheiks and Indians and other wealthy americans with family still in the old country. Here, for some reason, no small home model coffee grinders of any quality- the only one we could find had PLASTIC blades- POS, as we say in my country.
I brought my old Airport Apple router- virtually worthless in the USA, worth well over $200 US here. Even a crummy router here for wifi in your apartment is $100 or more.
Strangely enough, Epson printers here, at least the models I have priced, are not insanely expensive, which is good, since a printer/scanner is too big to pack.
But most any small electronics, particularly ipods, are worth bringing.
I wanted a razor blade scraper to clean paint off my windows- cant find em here.