1. Easy to use: Our stretch caps feature a renewed elastic design that is easy to cover or remove from the container, it is so stretched even square glass pans won't be a problem with these lids
2. Durability: With non-slip design technology, our elastic cover fits tightly on your cup or container, creating a sealed vacuum seal that keeps your food in the fridge for longer
3. Non-toxic: Made of 100% non-toxic materials, approved by the FDA, without BPA. Our stretch caps can withstand temperatures from -22°F to 450°F, and our stretch caps are also suitable for dishwashers and refrigerators.