h a l f b a k e r y
The word "How?" springs to mind at this point.
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A metal drinking straw with several decorative loop-the-loops in the mid-section. Each looping pathway is spaced out radially, so the overall effect is of a wireframe toroid at the halfway mark of the straw.
Hidden in the middle of this elegant mess of tube is a valve block. Each loop can be switched
in and out of the fluid route by means of a series of bimetallic disks. Each one trips at a slightly different temperature along the scale from "Youch!" to "Aaah". At one extreme, liquid travels through every loop sequentially. At the other, it bypasses them all and heads straight for the gob.
Assuming all of the mechanical details can be worked out, and some system to keep the temperature-sensing parts close to the coffee while keeping the valve block at a distance (possibly involving pushrods) can be devised, the result should be an automatic thermostatic drinking device that selectively cools your cuppa to always hit "Aaah".
Perfect temperature teasmade
Different device, similar result [8th of 7, Jan 15 2019]
blender render [mitxela, Jan 28 2019]
||There is actually a market for this.
||Ideal - plus, I can imagine being able to exploit
the inherent digitisation problem through price
differentiation and develop a range: Sport, Bronze,
Silver, Gold, Platinum, Obsidian and of course,
Harlequin. i.e. A range of products each with some
linear increase in selectivity. Those with only
enough cash to deploy on the "sport" version might
get 3 degrees of temperaturisation control, while
early-adopting A1's can splurge their disposable
income on a magnificent 32-level beverage
temperature ensmoothment system.
||//A range of products// That flies in the face of modern
marketing practice. What you want is a single product, sold
under a range of names. Much more cost-effective.
||If some of the coils passed through a small gas flame it could even be used for cold coffee.
||If you posted this on the same day you thought of it, it looks
like you and I had hot drink temperature regulation ideas on
the same day. Mine needs a bit more thought and research
before I post it, though.