By Veronika Bondarenko As inflation surges, private label products are enjoying growing popularity. Ah, private label brands — the Kirkland seltzers you alwaysstock up on at Costco (COST) – Get Costco Wholesale Corporation Report and everything from the peanut butter-filled pretzels to the international frozen food section at Trader Joe’s. Launched by the same retailer under a separate brand, the private label product has a lot going for it — they let their creators reap all of the profits (instead of sharing them with the manufacturer) while, on the customer side, they can become as beloved …