Cirkul 40oz. Brink Stainless Steel Tumbler with Handle, All-Day StrawSip, Double-Wall Insulated

** Cirkul 40oz. Chameleon Stainless Steel Tumbler** The Cirkul 40oz. Chameleon Stainless Steel Tumbler presents a modern and functional design that appeals to hydration enthusiasts looking for a reliable and stylish way to drink water throughout the day. Many users appreciate the dual functionality of the tumbler — allowing for sipping through a straw while keeping beverages cold for extended periods due to its double-wall insulation. Frequent comments highlight the solid build quality, confirming it as a durable choice for daily use. However, the product does come with certain limitations that could affect user experience. A notable concern is the requirement to keep the tumbler upright, as tipping or tilting can hinder the user’s ability to enjoy their drink. Users have reported difficulties in extracting flavors from the cartridges when set to higher increments; the designs seem to favor a more passive drinking experience that some find less satisfying. While many appreciate the convenience of the straw, others criticize the overall flavor infusion process, with comments suggesting that it may require additional adjustments or “hacks” to be effective. Additionally, the tumbler's top-heavy design has led to some issues with stability; incidents of it falling and denting have been mentioned by users. There are occasional sizing concerns as well, with some users finding it does not fit standard cup holders. Despite these drawbacks, numerous reviews emphasize that the tumbler functions well for keeping beverages cold and is a practical choice for hydration on the go. **