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This is a great idea however it doesn't fit securely enough to the bottle. The boot fell off within hours of being fitted.
I received this with my bottle and installed it to the base. Stuck the bottle in my backpack. Took it home, washed it and filled it with water. Took it to my car and placed on my passenger seat and took it to outrigger paddling practice in the canoe.
At the end of my practice I realized it was missing(wasn't in the Canoe) and I have no idea when it where it came off.
Quite frankly the bottom is good, fits wonderfully to my iron flask bottle. But the color is clearly off. Ordered a twilight blue bottom and it is clearly something closer to purple. Will update review should customer service reach out to me.