Review on ZWILLING Fresh & Save Large Vacuum Sealer Glass Food Storage Container (2-Pack) - Airtight Meal Prep Container for Food Saver by Arlene Byrd

update After another lid cracked I contacted Zwilling customer service and they sent me two new full packs without returning the old ones. Excellent customer service. I now have five large containers with two cracked lids.------------------------- -------------- -------------------------------------------------- ------ ----------------The inside of the lid cracked after 4 months after only 23 uses. It seems the material is not strong enough to withstand the vacuum pressure. I was thinking about trying the twin guarantee program but found that shipping costs are borne by the buyer. I may have to wait for my other lids to crack to save on shipping. Having invested a lot in the Zwilling vacuum system, I have no choice but to keep it. Too bad there would have been 5 stars without crack.