1、Premium Material: The 16 oz wide mouth mason jar is made of  strong thick glass. The inner wall of the glass tumbler is stainfree and, would not absorb food, pigments or odors. Equipped with a pure natural bamboo lid, rusting and deformation are prevented, and all materials are BPA,PVC and meet food safety standards. 2、Ecofriendly Natural Bamboo Lids: Mason jar drinking glass is fitted with pure natural bamboo lids with waterproof coating which will not get rusty or deform, being reusable and durable. The bamboo lid of the boba cup also has a wide hole in the middle for putting a straw.  3、Convenient and Durable: This mason jar lid with straw is made of thick glass. The inner wall of the glass bottle is and will not absorb food or pigments. The wide mouth of the jar makes it easy to clean. 4、Perfect Detail Design: A detachable silicone is fitted in the inner side of the mason jar lid, which is and leakproof to avoid the liquid inside the cup being pour out when using. Our bamboo lids come with a thicker silicone gasket, please spin the lid a few times with pressure if the lid cannot be tighten well. 5、Wide Range of Uses: Perfect for jams, jellies, honey or molasses, honey, cocktails, DIY magnetic spices, canned fruits. We have designed safe packaging for each glass bottle and it will to your side in the best condition. Specification: Material: Glass Color: White Size: Cup:16 x 7 x 7 cm/6 x 3 x 3 inch; Straw: 20 cm/7.9 inch Weight: 1135 g Capacity: 16 oz Package Include: 4× Mason Jars 4× Lids 1× Straw Brush 2× Straight Straws 2× Curved Straws