About this item. Temperature Range The folding cup is suitable for coffee, milk, tea, hot water and beverages, which range in temperature from -58 F (50 C) 392 F (200 C). How To Use First: move the white PP ring. Second: open the lid on the white cap (at the top of the mug). Third: Pull the bottom of the mug so that the mug body can stand upright. Fourth: open the cap at the top of the mug. Carefully: cover the mug with the white PP ring so that you will not get burned by the hot water. When you want to fold it up after drinking, leave the lid on the cap open, remove the P-ring. BP-Free Folding Travel Mug The folding coffee mug is made from 100% silicone and PP food grade BPA free. The waterproof portable coffee mug is approved by FDA food safety test, non-toxic, odorless, lightweight. It can be used in the microwave and fridge. Reusable coffee mug with rubber lids, secure heated stoppers and sleeves. Suitable for Use Folding mugs fit your pocket and bag. Suitable for outdoor activities and daily use such as travel, hiking and camping ect. Eco-Friendly: Using our reusable coffee cup replaces the disposable coffee cup is eco-friendly. Helps protect the Earth.