Made of 100% food-grade, FDA approved, platinum-cured silicone that is free of BPA, BPS and phthalates. They’re 100% safe, durable and will never wear out. These unbreakable silicone drinkware are ready to join your next backyard BBQ, kid’s days off, or floating the river. Silicone is made from materials that exist in abundance – the same materials that make up a huge percentage of the earth’s crust. Silipints don’t employ limited resources like petroleum or metals that need to be drilled out of the ground to make plastic cups and metal containers. Silicone, in the form of a rubberlike substance, is a material composed of silicon, carbon, hydrogen and oxygen, and a curing catalyst used to harden the liquid silicone substance into the desired shape. These ecofriendly silicone cups, reusable glasses and straws are not just safe because they’re BPA-free and won’t shatter, melt or collapse. According to Scientific American, they’re also safe because they’re chemically inert and stable, they don’t react with or leach into food, silicone doesn’t outgas vapors, even at high temperatures, silicone isn’t toxic to soil or organic organisms, even if they end up in the waste stream and are incinerated, they are reduced back to harmless ingredients, and silicone is hypoallergenic and therefore does not support microbiological growth.