Freezer-to-Microwave Safe – Thick 5mm borosilicate glass containers withstand -20°F to 450°F, perfect as freezer-safe glass food storage containers or microwavable soup containers with lids cracking. Freezer-to-Microwave Safe – Thick 5mm borosilicate glass containers withstand -20 ° F to 450 ° F, perfect as freezer-safe glass food storage containers or microwavable soup containers with lids cracking.
eBay