1) Close up securely 2) Encase securely 3) Enclose 4) Give no escape 5) Immure 6) Keep from leaking 7) Lock up tight 8) Make Tupperware-fresh 9) Prevent from escaping 10) Secure via a Ziploc 11) Securely fasten 
verb close with or as if with a tight seal; `This vacuum pack locks in the flavor!`