My family uses our BLENDER bottles daily fir mixing hydration sticks, smoothie powders, and fruit waters. The blender bottle seal is wonderful but it does tend to build up residue from the drink mixes around the screw top of the lids. This innovative cleaning tool really works well with the silicone “teeth” getting between the spiral grooves. The brush end is wonderful for reaching the bottom of the 28 oz bottles or between the wire blender ball. The hard scrub loop is great for cleaning out the crannies and spout of the lid. I really appreciate having one tool that can accomplish three specific cleaning areas.Suggested improvement is to add a “click lock” on the rotating end of tool. It is nice that it spins 360° so that you can change the angle of the cleaning tips. However, it needs to be held in place by keeping your finger in the loop which does reduce the length of reach into your cup or lid.However, I loved the versatility & compact nature of this device. I purchased 1 set of three so that I could have one in our kitchen, 1 in our camp tote, and 1 in my classroom. But my children liked them so much I bought a second set so they could each have one for their gym bag, or dorm room.I will likely purchase them again, especially if the color variety expands (Purple, Coral, Red, Teal). Having the different colors helps members of the same family or patrol identify their own cleaning tool without walking off with mine. (LOL) I would also love to put matching tools inside reusable water or blender bottles for thoughtful gifts for my colleagues and camp mates.