This cup internal material using 316 stainless steel, shell using 304 stainless steel, pp cup cover, silicone straw, thoughtful safety buckle design, sealed leak-proof, put in the bag without worrying about being squeezed leak, straw plus straight drinking mouth, food-grade silicone straw, non-toxic and harmless, use more at ease.This will be a nice present for your teenage son, daughter, niece, and grandchildren, these stainless steel wateBottlesill let you enjoy your refreshing smoothie, fresh fruit juice, or your hot caffeine boost. Measuring 33oz, this custom travel water bottle with straw-1000ml. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization available: Print your logo or customize packaging and color schemes. Product Highlights: BPA-free, leak-proof, travel-friendly.