Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE product_suppliers (product_id VARCHAR, total_amount_purchased VARCHAR)
### Question:
What are the ids of the top three products that were purchased in the largest amount?
### Answer:
SELECT product_id FROM product_suppliers ORDER BY total_amount_purchased DESC LIMIT 3