The birth of Kate and William's baby is expected to lead to a right royal knees-up, with analysts saying that $100m will be spent on food and drink to celebrate the birth of Its Royal Babyness.
Joshua Bamfield, director of the Centre for Retail Research (CRR), estimated that the arrival of the baby, due in July, could add more than $300m to the British economy.
He added, "There has been a lot of interest across the Atlantic as well, as the younger royals are very well thought of in the United States, so we are expecting good sales of souvenirs."
Although there is not an official line of new, curated baby goods, the Royal Collection already sells baby gear including a baby sleepsuit modeled on a guardsman's outfit.
According to the Christian Science Monitor, the shop at Prince Charles's country estate Highgrove is selling handmade baby shoes.