The duo shared three tips with CNBC Make It on how to run a successful business — in good and bad times. Putting customers firstWhen it comes to building a successful business, Hamilton has one guiding principle: you have to make products that people love. She launched the hair masque in 2018 when she saw a "mid-tier space" in hair care products that had yet to be filled — products of salon-grade quality, but at an affordable price. When people love one product, you can convert product love to brand love. "When people love one product, you can convert product love to brand love," Ostrowski shared.

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Persons: Emily Hamilton, Alexander Ostrowski, Coco, Tik, Ostrowski, Emily, Hamilton, Emily Hamilton Co, they're, —, it's, Alexander Ostrowski Co, there's, I've Organizations: CNBC, Hamilton, Eve, Coco Locations: Bali, Singapore, Covid