Sealed Air was upgraded to a buy from a hold by TheStreet Ratings. Six of the 11 analysts who cover Sealed Air rate it a hold; five consider it a buy. Sealed Air's forward P/E is 12.5; the average for containers and packaging companies is 12.76. Crown Holdings ( CCK) has a forward P/E of 10.21; Rock-Tenn ( RKT) has a forward P/E of 8.96. Sealed Air closed Friday at $20.71; it has risen 20.34% year to date. The stock's 52-week high of $28.77 was set on Feb. 14, 2011. TheStreet Ratings gives Sealed Air a B grade and a $23.12 price target.