The following are some recommended online names for selling milk powder:
1. Milk Powder House
2. Milk Source Shop
3 . Nutrition Shop
4. Milk Powder World
5. Nutrition World
6. Milk Powder Paradise
7. Nutrition Station
8. Milk Source House
9. Milk Powder Shop
10. Nutrition House
I hope these names can provide you with some inspiration and help you find the right online name.