Ooh fantastic another hammy lover..

I use the safe bedding from pets at home which is like paper flakey stuff. It's £2.99 for a large bag. Are you getting two males or two females? Be aware that they might not live together once they hit maturity because they can be territorial. I've kept dwarf hamsters together in the past and it's never worked out but I know some people on here have had success but I would have a spare cage on standby just in case.