mason jars 4 oz, aiviki glass regular mouth canning jars with silver metal airtight lids and bands for sealing, canning, dry food, preserving, jam, honey, candle, meal prep, overnight oats, food storage, salads 40 pack 40 whiteboard labels aiviki <b>4oz 40 pack glass mason jars regular mouth help you to organize and customize your kitchen</b><br/> <b>bpa free & food safe</b><br/> made of high quality, 100% bpa free, toxic-free, lead free glass to ensure food grade safety.crystal clear glass with highest visibility helps you find out what you need at first sight and check progress on fermentation.<br/> <b>leak proof and airtihht seal</b><br/> ensures airtight seal & leak proof to keep food fresh and extends its shelf-life. no spills and allow food to retain and maintain its best taste.<br/> <b>reusable whiteboard labels</b><br/> labels included are blank and reusable for you to fill in and wipe clean as needed.<br/> <b>perfect canning & food storing</b><br/> canning and preserving pickles, peaches, peppers, jams, jellies, preserves, tomato sauces, salsa, broths.prepare meal, make drinks, salad, desserts, smoothies, milkshake. store nuts, sugar, beans, honey, rice, oats, spices, cookies, candy, fruit, or any dry food.<br/> <b>multifunctional mason jars</b><br/> diy & decoration, wedding, baby shower, party or home decoration or gift.<br/> <b>note</b><br/> 1.the sealed glass jar is made of non-heat-resistant glass material, please do not pour boiling water directly from the jar. it is recommended that the heat-resistant temperature difference does not exceed 50°c. use the water below 50°c to pre-heat the body of the bottle, and then pour the boiled water to avoid broken.<br/> 2.after cleaning the lid of the jar, please dry the water in time to avoid rust.<br/> 3.leave a gap of 2-3 cm in the bottle mouth, and open the cap regularly to exhaust pressure.<br/>