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

Input:
Question: Will it work with small (5.5 to 6 oz) pet cans?
Document: Getting good use out of this new can crusher. The only down size is that it will only crush the 12 oz cans. But no biggie, that's 90% of what we use anyway.
Love this crusher....we've learned to just buy 12 oz. cans since the 16 oz do not fit. Very easy hand pull compared to the last type we had. It's as easy as tossing a crumpled piece of paper into the waste basket.
Yes, it is expensive. But, this is so easy to pull and has a removal catcher bin. Its well built to last forever almost. I highly recommend. Everyone who has used mine wants one now. I recycle all aluminum cans now. The only single con is that it won't accept large cans (16 oz.) but the can be twisted in the middle and then they fit, just a little more trouble.
Crushes cans efficiently and easily. Has good leverage so it doesnt take a lot of strength to use. The bucket holds a lot of cans. Havent filled it up all the way  yet but at least 36 maybe more. Havent had it long enough to say long it will last but the construction seems good. Only con so far is that it wont fit a 16oz can. Only 12 oz ones fit.
It works great, it is pretty easy. Hint: squeeze the can a bit to put a bit of a crimp in it before crushing-  makes it easier on you and the crusher. I ended up not using the collection bin, I just put a lined trashcan under the crusher to catch the cans. They just pop right out and fall into the trash can. Not that the collection bin doesn't work, I just figured I'd end up washing it out too much.
This unit was not as robust as we had hoped. It must be anchored to a wall or beam in order to work properly.
We were crushing our cans one at a time with a large hammer before we bought this Easy Pull Can Crusher! It was messy work no one wanted to do. I read many reviews and knew the cheaper devises would not be worth trying. So I took a chance and purchased this more expensive Can Crushing System. It is worth every penny! The quality is good. The easy pull is just that, 'an easy pull'! The cans are crushed, and then fall into the Collection Bin.
Wish I had found this before. I have tried many systems for crushing cans but this one is absolutely the best, hands down. It takes so little effort and it is self-contained. I can actually have this one in the house and not have a mess. We have been recycling cans for years and would have a pile of bags of cans (I mean a hugh pile!) to take to the recycling center every 6 months or so.
This does not occur often.About the collection bin. If one has enough space to place a garbage can under the crusher, it wouldn't be necessary. However, I don't have that luxury. I store cans under my sink in a small waste basket that holds 20 cans or so. When full, I bring to the crusher. The bin holds two loads of cans before it needs to be emptied.
I have had this collection system for over 5 years.It is very durable and does not leak.I drink a fair amount of beer and soda and it still took over a year for it to pay for itself.It is very easy to use and you only have to rinse out the bucket to clean it and keep it from smelling.I would not buy anything else!
Answer: Are they aluminum cans ????  I think these can crushers are designed to crush only aluminum.. Metal cans can be quite stiff..