If you're wondering where all the baby milk formula in Melbourne had disappeared to, this shop in Box Hill may hold some answers.

On a wet Tuesday afternoon, about a dozen people were frantically buying and packing cans of formula to send overseas, either to family and friends or for a tidy profit.

Credit:Kate Geraghty

The shop, Australia SFX Global Express, was doing a roaring trade both selling and then shipping the tins of white gold to several Asian countries including China.

The shop also provided cardboard boxes and even suitcases, and tables stocked with tape and packing peanuts, where customers packed up the tins and handed them back to staff to be posted overseas.