It'll likely be either my usual 24/7 pocket EDC - a BM 755 MPR, recently resharpened, or a ZT-0551, in my pocket when I arrive at the in-laws this AM for present exchanges. If I could remember to get it out, a basic Buck 110 has definite advantages - it's thin edge and hollow grind make quick work of blister packs, large boxes, etc - and it'll re-edge easily, should an error occur. I'll leave the good knives home... don't want my 'show-offs' to actually get used! Seriously, a decent knife - not your finest or hardest to open/close - would seem appropriate if you must open a mix of goodies.
Merry Christmas!
Stainz