olly's mystery package

Today there was excitment for several of us here at fruit towers when Olly's mystery package was delivered. We all had a few guesses at what it might be. It was quite light and made a sound a bit like a rainmaker (except deeper) when you turned it upside down. We're hoping Olly has finally got round to retiring his old Nimbus 2000 in favour of the new Firebolt. Just in time for the start of the quidditch season. What do you think it could be?