Investors interested in stocks from the Containers - Paper and Packaging sector have probably already heard of Berry Global (BERY) and AptarGroup (ATR) . But which of these two companies is the best option for those looking for undervalued stocks? Let's take a closer look.There are plenty of strategies for discovering value stocks, but we have found that pairing a strong Zacks Rank with an impressive grade in the Value category of our Style Scores system produces the best returns. The Zacks Rank favors stoc ...