Premium MaterialSilicone tips for straws are made of high BPA-free rubber material, safe and food grade rubber.Compared to others, durable,eco-Friendly,lightweight and portable, easy to use. Conforming to the food grade, non-toxic,non-harmless and no-odor, these were designed specifically for both safety and durability, suitable for long use. Simple DesignOur silicone straw tips cover have a scratch-proof, dust-proof and avoid metallic taste design. Pretecting your lip and don't worry about chipping your lips, teeth.If you hate the taste of metal straws, this can help you not touch the straws directly. Easy to Use This straw plug is wear or take off the convenient,has enough elastic to fit your straw well.Only fixed straw cap on the 7.5mm/0.3 inch straw and you can directly drinking,can keep your drinks clean and to prevent your lip.(NOTE:Only fit for 7.5mm/0.3 inch metal straws,thanks!) Perfect Gift The straw covers for reusable straws are perfect gift for girls, women, your friends daugher, wife, mother, sister for birthday, christmas day, mother's day, valentine's day, halloween. Lovely muti-colors dust-proof straw tips set is the best choice for you.