DuraPrint technology makes tumblers chip-resistant, peel-resistant, and dishwasher safe. Quiet, nonslip base prevents noisy slipping and sliding. Slider lid is BPA-free, leak resistant, easy to open and close, and easy to clean. Triple insulation reduces condensation and keeps drinks hot for up to 8 hours or cold for up to 24 hours (always use caution with hot liquids). Fits most cup holders for on-the-go convenience, making it the perfect stainless steel travel tumbler and tumbler for coffee. Durable, copper-lined 18/8 stainless steel construction won't retain tastes or odors. Do not soak or use harsh cleaning materials (like bleach, chlorine, etc.) Do not put in freezer or microwave. Manufactured in China. Designed in, printed in, and shipped from Florida, USA. Stainless steel tumblers feature a limited 2-year guarantee.