Oh-kaaaay...you got to me.
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While at Winco the other day, I noticed a whole slew of these 750ml water bottles in all different colors! Green's my fav, but they got red, pink, purple and blue, too...
BTW, did you notice that these look remarkably close to very-big baby bottles?
...so when I got home with it, I got one of my Gerber NUK bottles (the one with the big nipple & collar), removed the collar & nipple and sized it up. Bottle neck was too big, and then after some thought I decided to carefully cut the top off the Gerber bottle (I have extras)...the diameter matched the water bottle cap perfectly, so I cut off enough to flatten it without cutting into the cap's seal surface inside. Bear in mind, this is a functional mock-up...so I used the best adhesive which I could find which had the lowest risk of toxicity, and that was aquarium sealant. Loaded the bottle up with iced tea, had at it...and it was a very positive experience (but I'm being biased here).
It worked. So I went into my CAD program, took measurements of the adaptor I made, put it on the "board", modified it to both be compact and use as little material as possible and sent the design to my AB friend with a 3D printer. He's working on it as time allows. I should have a second, more-solid prototype soon. If that works out, I'll have these made from food-safe plastic, I will buy a batch of different-colored bottles from the importer and offer these up. I do not want to make a profit off this, as being the niche we are, there is not a lot of profit in anything AB, possibly excepting our diapers. This is just something I want to do.
So, there it is. Thoughts?