1.HEALTH MATERIAL Made of high quality BPA materials (304 filter lid: AS Outer Box: PET, the yogurt strainer ensures food preparation and ensures durability. Its robust construction guarantees longlasting performance, which is valuable addition to your kitchen. 2.Use You only need 4 steps to easily enjoy delicious. 1. Pour yogurt. 2. Cool for 48 hours. 3. Remove and serve..4. Strain whey to serve. Cooling filter has natural drain, fridge cooling filter separates automatically in 48 hours. Different filtration time gives different thickening effects. If you want it thicker, need to cool for more than 48 hours. 3.More intense yogurt: our yogurt strainer has 304 steel screen fine mesh bag, it is rust and corrosion resistant..Fine holes can thoroughly filter yogurt, nut milk and other liquids, effectively remove excess moisture and leave you a smooth and creamy texture. Let you taste more intense yogurt taste. Moreover, the fine mesh bag is removable for easy cleaning, just use a brush. 4.Upgrade leak protection design: our yogurt strainer has lid design to avoid dust and odour..There are ventilation holes on the lid. Close the ventilation holes to seal the food. Open the ventilation holes to ventilate the food. It has builtin sealing varnish, sealed without smell.