The glass tumbler with straw is made of reliable high borosilicate glass material that can withstand sudden temperature change, sturdy and safe, no odd smell, thick and lightweight, so you can use it with confidence. Clear tumblers with silicone sleeve and straw measure about 28 oz/ 800 ml in capacity, easy to clean and use. Custom logo is welcomed! Measuring 28OZ, this custom glass bottle with silicone sleeve and straw. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. We offer logo printing and full packaging customization. Product Highlights: BPA-free, leak-proof, travel-friendly.