Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Is it aluminum on the inside?
Document: I purchased this stainless steel cream spritzer to replace an aged one of the same brand (is there any other?) that had plastic and aluminum parts.This one works flawlessly and is rather handsome. Highly recommended.
Product works as advertised and my wife loves it. I was used to doing whip cream the old fashion way with a mixer but this makes it all much easier. I still wish you didnt have to purchase and then waste all the aluminum cartridges or maybe re-fill them from a larger cannister.
I received mine in a box that had been unsealed which was my first disappointment. Second, I expected that the ISI (Austria) products were made in europe but this was made in China, seriously, you can't make enough money on a $[...] creamer if you made it in europe?. Third, I paid the extra bucks for a stainless unit and then it states on the box that the head is aluminum, only the bottle is stainless.
Add some mint syrup along with a few drops of green food coloring to your cream. (Mix this in a separate container to avoid staining the inside of the whipper.) The result is a St. Patrick's Day green mint whipped cream.One caution: Always fully discharge it before opening it. I accidentally left it at my brother's house in his refrigerator last Christmas. He thought he'd do me the favor of cleaning it before returning it. He opened it while it was still mostly charged.
the only reason starbucks replaces these would be b/c of dents. you can buy new nozzles and new gaskets and im sure the top piece separately as well. if you need help with these im sure your local starbucks will help.
thanks. every thing was exactly as I wanted. I"ll  for sure  buy more stuff in this site.
ok, so ive been working at starbucks for about 4 years now.... use about 7+/- tsp. (pumps) of SYRUP flavoring. powder will dry it out. hershey is actually pretty good or vanilla. after you put syrup in, then fill canister 3/4 full of heavy whipping cream. if you put too much heavy whipping cream or too little it will mess up how it comes out.
if it is shooting out too fast then you can twist the nozzle tighter. before changing the gasket(it will take a LONG time with home use) try taking it out and flipping it over and putting it back in... it wont leak anymore for a while till it really does need to be replaced. and these are dishwasher safe.
You can also tint and flavor your whipped cream, this is not an option with a store bought can.If you have the hot and cold whipper, you can use it for hot liquids also, such as soup, try doing that with an empty can of Ready Whip!We have had ours for over two years now and have never looked back.
Yes the natural fats in a raw (unpasteurized) cream are actually good for you in moderation. If we want it sweeter, we have found that adding a bit of maple syrup, stevia, or agave nectar does the trick.The best part about this unit is that you get to control what your whipped cream is made from.
Answer: The entire canister is stainless steel.