Made of food grade natural silicone.<br> Apply to various brands of cups as long as its bottom diameter is within the appropriate range.<br> Protect the bottom of the vacuum cup from scratch and protect the bottom of the glass from being crash;Anti-slip material avoids your bottle being knocked down accidentally.<br> Different colors can be chosen to bring different moods to each day.<br> Tips:Please note the diameter of the cup bottom, in order to protect your cup more tightly, it is better to have a bottom diameter larger than 2.56 inches and less than 2.67 inches.<br><br> Package includes:1 pcs Bottom Protective Cover Cap.<br> Thank you for choosing our products,If you have any questions about items, please feel free to contact us, we will reply in time.