“These lids are very thoughtful in their engineering. The plug for the straw is firm but not too tight, as is the coffee sip part. I like having the straw that fits right in, and has a larger diameter as well -- most of the other metal straws I have are too thin, and most tumblers don't have a lid that fits the straws specifically, or centers them. Additionally, unlike the (admittedly fun and easy to clean) yeti mag slider, lids, these ones don't leak at all if they're closed. The ability to have an all in one koozie turn into a tumbler is honestly an amazing idea as well. I can't fathom why none of the other big companies have done this yet. Huge kudos to Frost Buddy. Next up, let's make one that fits the XL Buddy, eh Frost Buddy?”
