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Best supermarket
You can find everything
For all you need for home
A great place to shop in bulk. Reasonable prices and wide variety. The only problem is that it's located outside the main city and if you don't drive you will find it hard to find a taxi back.
Magnum is Magnum even in Astana.
24 hours open
Inexpensive price for food
good place to shop 24/7. Also great deals!