I prefer glass jars. I think glass jars always work the best for preserving tomatoes. Here’s why. (Multiple reasons.) Glass jars are strong enough to hold nearly any variety of fermented tomatoes you want. I have one Ball Mason jar that holds 6 cups! (That’s a lot of tomatoes.) Also, glass jars are transparent – so you can watch for the fermentation bubbles and easily burp your jar without stress. Glass jars are also tidy. You can place labels on them without stress, and they store easily on a shelf, on your table, or in a cool dark area of your home. Another reason they’re the best is that glass jars last forever! I’ve had jars last for years – and they’re still in perfect (and glossy) condition. Glass jars also have excellent reputations for fewer chemical bleeds – and most glass jars I’ve researched are 100% BPA-free.