Vegetable Garden Spaghetti Recipe Made With Spaghetti Squash. Repurpose Mason Jar Rings Into Egg Rings. I have to agree.
I don't think mason jars use the highest grade materials for being heated to 400°+. I would guess that mason jar lids are composed similar to "tin" cans, which are tin coated steel. The tin (or any other coating, such as zinc, prevents corrosion of the steel. Tin has a very low melting point, about 450°F, but will most likely begin to crack and flake way before this. Turn Water Into Fresh Sparkling Water And Soda. Welcome Page. Recipes & Cookbooks – Food, Cooking Recipes from BettyCrocker.Com. Allrecipes.com - recipes, menus, meal ideas, food, and cooking tips.