Hatching Tides Items

[Eli_Jin]

So I got the first hat... But the guy still just keeps offering to make me the same old hat, and the girl keeps giving me the same types of eggs... How do I start getting the OTHER hats??

Yes this is the question at the moment. How do we upgrade (assuming it's an upgrade process) the first hat to the to the r15/20/30/40 ones? Neither the website nor the NPC's in game mention anything about it that I've found.