Added to purchase of trays in order to tie with string and stack in the freezer in advance of event and to later transport to venue. I placed trays with lids still tied with string in an IKEA bag to carry inside for set-up and inadvertently fell in venue parking lot - it was a dark and stormy night. The lid remained in place with no damage whatsoever to the contents - which plastic wrap simply would not have been able to prevent. I recommend and will repurchase.
