I highly recommend this portable bassinet called Nest by Phil & Teds. It's a little portable bassinet that folds down and zips away into the bottom of a bag which you can use as a suitcase. You can put more than everything you need in there to take your baby away for a weekend. The mattress is nice and soft but it's nicer if you put a quilt under the baby too so it's warmer and snugly. You don't need to buy the sheets to go with it, normal bassinet sheets work fine. It's only $133 NZD but will only last up to about 9 months old. It's 80cm long and weighs about 2 kg.