Luiaiog Glass Cups with Lids and Glass StrawsMason Jar Cups High Borosilicate 20OZ Tumblers (2Pcs) for Coffee Tea Juice Smoothies Hot/Cold Drinks at Home Office

What is the correct way to open the lid? Always remove the straw completely before unscrewing the lid. This crucial step prevents pressure build-up and protects the straw from potential damage, ensuring your safety. Is this cup dishwasher safe? To preserve the longevity and clarity of the glass, hand washing is strongly recommended. Use a soft sponge and mild detergent. The straw and silicone seal should also be hand-washed.A dishwasher with a fixed position is also acceptable. How can I prevent chips or breaks? While durable, this is a glass product. Handle with care. Avoid impacts, dropping, or banging it against hard surfaces. For daily use, place it gently on a coaster or table. Can I put boiling water in this glass cup? Our cup is made from heat-resistant borosilicate glass. However, to prevent thermal shock and potential breakage, avoid pouring boiling water directly into a cold cup or placing a hot cup into a freezer or icy water. The glass cup I received was damaged during transportation. What should I do? We're sorry your item arrived damaged. To get help, please go to Your Orders on Amazon and use the "Get help with order" option. We will assist you promptly.