Im going to make a rack here in a couple weeks and was wondering which wood is poisonous for BPs?

I know every one uses melamine but its so heavy and expensive so I was trying to find a cheaper lighter material. I was thinking about PVC but home depot dosnt have it (got money to build it as a gift in the form of gift cards).

Well after its stained and aired out should it matter? all the toxins in the wood would be sealed in. but I dont wanna rish it thanks!

Thanks!