Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: what size filter does it use?
Document: Great coffee maker for camping. Sure beats boiling water and other methods I used to use. Just fill it up and let er go. Cleanup is easy since all you have to do is throw away the filter. No mess and no washing needed.
The first two times I tried to use it the coffee did not drip through the filter into the carafe. I finally realized that its "pause and serve lever" is not well designed. At least with my device, when the filter basket is opened and then closed, the "pause and serve" lever does not always line up with the the trap door under the filter basket. So even when the carafe was in place, the trap door was not opening to let the coffee through.
Plus, if the glass carafe breaks you can get a replacement easily because colemen is owned by Mr.Coffee? (or one of those coffee companies) I did have just one small problemo...a little knob had broken off the filter basket, but the basket still stayed in place while the coffee brewed for the entire trip, I didn't even have to use any duct tape LOL, when I got back I contacted Coleman and they instantly replaced the part free of charge without any hassle.
Little Slow and watch your flame size, but the coffee was perfect. As soon as it was done I poured the coffee into a thermos and was good all day.
The drip stopper sticks in the wrong position making the filter reservoir overflow. Must have a close flame to make it work
We tried our coffee maker out on the 1st day of our trip, and the filter holder opens up and dumps the hot coffee on the ground. My brother in law told me we didn't hook it correctly so he tried his and guess what happened to, his went all over the ground. If you want one I will send this junk to you.
I purchased this coffeemaker for those times when I don't have electrical hookups in campgrounds. I've used it on a number of occasions and, yes, it does make good coffee. But I'm a solo traveler, so a 10-cup unit is a bit of overkill for me, especially considering its size. I own a Casita travel trailer and have to remove the grate from my stove for it to fit under the stove's hood.
Just tried it out tonight on my coleman 2 burner stove. It works amazing. Perfect cup of coffee just like home. You do have to make sure filter door is closed securely and know that it has pause and serve feature so make sure the carafe is all the way in. Can't wait to have great coffee while tent camping! !
The first time we used this the plastic filter basket melted! We followed the instructions exactly. It was used outside, on a Coleman stove, plenty of ventilation, and the outside temperature was even in the low 50's. Still the whole side of the plastic filter basket melted and stuck to the lid of the coffee pot. Good thing we were paying attention to it before it caught anything on fire.
It brews hella fast. Takes less than ten minutes, no percolating, no boiling, it just brews like you plugged it into a wall. We made four pots of coffee within thirty minutes and everyone was happy, not too strong, not too hot, just good ol' coffee. Oh, and because there is NO information anywhere, it's a basket filter. Cleans up nice and cools off quick too. I'll be taking this ANYWHERE there is no electricity!
Answer: Standard 10-12 cup basket filter.