UPDATE 8/6/24: The carrier bag has held up to hard daily use and protected the cup quite well. It's showing dirt so I'm about to find out if it truly is machine washable. When I wrote the initial review, I overlooked the fact they include two of each of the leakproofing seals that come with the kit. Since I have a dedicated Stanley just for coffee as well as the big one for cold water (plus who knows how many other cups and tumblers, this summer has been The Summer Of Giant Cups) this is a life saver. I have reservations about the square one, since all it does is rest inside the open spout; seems a little redundant but I'll see if it's any improvement over the factory setup. Stanley lids are not strictly leakproof out of the box (but there are competitors who genuinely are). There are also two plain straw toppers in addition to the cloud and the flower, for customers who may desire a less whimsical and more "professional" appearance. They are completely neutral in appearance and will integrate nicely in a business setting. ORIGINAL REVIEW: This set comes with a rich assortment of accessories for your Stanley Quencher tumbler or any compatible competitor. There are a few smaller silicone seals that you can deploy on the lid to help make the spout and straw openings even more leakproof, there is a standard size clear straw that feels virtually indistinguishable from the OEM Stanley straw, and there are two tasteful straw toppers, a happy little cloud and a flower that I'm pretty sure is a hibiscus. Before the manly men in the audience get in their feelings about the hibiscus I'd like to point out that this flower brings associations of summer and the beach, which are perfectly on message for a tumbler whose primary purpose involves hot-weather hydration. The only issue you may encounter is that pink may not harmonize with every available tumbler color. Still, these are great little straw toppers, not some cheap afterthought. This set also includes a cleaning brush to help keep all your Stanley straws clear and sanitary. This set also includes a small silicone boot for the base of your cup. This is meant to insulate the bottom section against scuffs, scrapes and small dents. I have declined to utilize this boot thus far, as the included carrier bag addresses this need quite nicely. I have other, similar boots if I were inclined to go that route. I have to be honest, I don't think this one is nearly as nice as others available elsewhere. This is just a matter of personal preference; this boot will do the job of protecting your cup. I just don't care for the way it looks, and I also prefer the silicone boot that goes high enough to meet the swell of the cup where the wide part begins. The star of the show is the carrier bag. While this one is quite plain compared to others available, there's absolutely nothing to complain about if this was your only option. It has two small zippered pouches and an adjustable shoulder strap with soft pad. The hardware is standard black clips and D rings, nothing extraordinary but more than sufficient to do the job. I don't think the zippers are the best quality but I think if you're not using them a hundred times a day they'll probably last a while. I can report that this carrier bag has survived the rigors of life on the go with a 5 year old child; it has protected her cup while withstanding the heavy use that comes with trips on the bus and through summer program hallways. Carrier bag shows no signs of failure, although this light cream color has certainly picked up some stains. My next project will be to grab some Dawn dish soap and try to clean the bag in the sink. I've had good luck cleaning similar neoprene tumbler bags with Dawn so I have high hopes I'll be able to restore this one. All in all this set is an outstanding value. If you're fine with the literal plain-vanilla color scheme you're unlikely to find this assortment of quality accessories for your 40 ounce tumbler in one place for such a low price. Highly recommend. Read more

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My 9 year old granddaughter picked this out herself as a gift & she really liked it. Read more