My Olleh Purchased Olive Young Sale Recommendation: TheraBreath Clean Mint

I buy various things whenever there is an Olive Young sale, but this is a product I always make sure to stock up on without fail. If I buy it at the lowest price online, I have to buy too many bottles, and since it is an oral care product, I feel uneasy about stocking it up for a long time. Also, I've found that when I combine a sale with a card discount, I can often buy it for less than the lowest online price. Furthermore, the time it takes to use one bottle coincides with the cycle of Olive Young's seasonal and monthly sales, so I end up buying it at Olive Young rather than online because I can use it right away.