I have been to both Cancun and Cabo. Both times we brought a Foreman and a sandwich maker (one for fleishigs and one for milchigs). Both times brought frozen chicken nuggets and cutlets (I think the brand was taam tov), frozen hot dogs, frozen deli, and frozen cheese. we had no problem with the x-ray. The nerve-racking part was pressing the button for inspection after the x-ray , both times we got the green light so had no issues.