Use these silicone tips on your 6mm stainless steel straws. Not only will they protect your lips from the hot/cold temperature of your drink, they'll also protect your teeth for any straw chewers out there.
There are lots of colors available, so choose the one that fits your personality - and your tumbler - the best!
Note: These straw tips will only fit the stainless steel reusable straws. They will not fit the clear straws that come with the tumblers. Colors may appear slightly different based on computer monitor.