The inside of the bottle is made of 304 stainless steel, while the outside is made of 201 stainless steel. The bottle is with a built-in, color matching straw that’s great for any occasion. We recommend hand washing for the best product care. When cleaning the product, do not use bleach or products containing chlorine. This item should not be microwaved or used in dishwasher. Measuring 17:oz, this custom stainless steel vacuum bottle with straw 17oz 24 oz. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization: Logo printing available with multiple packaging and color options. Product Highlights: BPA-free, leak-proof, travel-friendly.