At GoSili, we are a lover of all things sustainable and environmentally friendly, like silicone. Why silicone? 100 billion disposable cups go to landfills each year. Every day, 500 million plastic straws are thrown away in the US. Silicone is safe for you and your family and does not contain harsh chemicals that can leach toxic materials into your drink. Silicone is completely inert and safe to heat to super high temperatures and cool to super low temperatures. You can safely put this durable silicone straw cup in the microwave or freezer – making it the perfect reusable cup for your kid's favorite drinks – apple juice, milk, hot chocolate – you name it. This cup also includes a GoSili Reusable Silicone Straw. Our reusable silicone straw won't melt in your kid's drink like a paper straw or hurt your kid's teeth like a stainless-steel straw. To clean, simply place the silicone cup, lid, and straw in the dishwasher. No dishwasher? No problem. Wash the silicone cup, lid, and straw by hand or boil to sterilize. Our silicone products are safe, nontoxic, and sustainable, making this the perfect straw cup for kids. On behalf of our planet, thank you for making the choice to waste less, and go sili.