Answer:
Halo effect
Step-by-step explanation:
The halo effect is the tendency for a positive impression about a product, person or company to influence one's opinions about other aspects.
In the case of this herbal company, it is assumed that most customers would readily patronize drugs that is well packaged like normal pharmaceutical drugs; in a bid to appeal to the impressions of the customers about their products, the bottles were changed to look like pharmaceutical drugs in the pharmacy stores and the customers suddenly had a bias to wards the product.