Diaper Bag

Na
I ordered a diaper bag from Amazon after looking at all of the bags (literally) in stores at BuyBuy and BabiesRUs. 
It is PERFECT but- the lining is straight up thin cotton 😭 it said it would be "wipeable" which left me assuming more of a nylon. 
It's just thin white cotton.
How big of an issue does anyone think staining is? If I get a drop of poo or milk on the lining it'll be ruined but I can't find anything else that I like.