1. Q: Has anyone used these to make candles? Did they crack due to the heat? Buy it and you will get 12 pcs black matte glass jars with airtight bamboo lids, 20pcs 6inch candle wicks, 20pcs candle wick stickers, 12pcs wick holders, 12pcs candle warning labels, 12pcs candle boxes, 1pc candle wick placing tubes, 12pcs personalized scented candle labels providing a great individualized area to write the fragrance you emplaced and your name. making your candle making process more convenient and easier. a great value buy Large Capacity Easy Clean 7 OZ glass candle jar, measuring 2.75 in diameter and 3.30 in height, this glass jars without lids you can fill up to 7oz. If youd like with lids and wick space reserved. we suggest 5.3oz its the perfect. the candle making jars are dishwasher safe and easy to clean by hand. Originated from nature bamboo lids with airtight design. empty candle jars comes with bamboo lids, the bamboo lids with the rubber sealing grommets are super for keeping aromatic and flavorful. to add to the homemade feel, it comes with sticker labels that you write on yourself. Multipurpose this black matte glass candle jars with lids are designed mainly for organization and storage.made from thick glass and perfect for candle making and store a variety of food like coffee, jam, dried food, dried flowers, herbs, spices, nuts, tea leaves, etc. can be applied as containers for powders such as salt, sugar, ointments, bath salts, essential oil, cosmetics,flour, body lotion, slime, or other crafts. the airtight bamboo lids protects them no exposure to air. Riskfree Purchase Antibroken package box design for this glass candle jars make them a low damage rate in transportation. the packaging was very good. Any MISSING or DAMAGE JARS CONTACT US, FREE RETURN OR REFUND.