This looks neat and all but keep in mind that it's one of those things that you or whomever you gift it to will never use after 1 or 2 times. It makes for a neat display piece; that's about it.
If you’re influenced by comments like: “Martinis just might be the classiest drink ever”, you just might think this drop has something to offer—it doesn’t.
What makes a Martini taste good, as opposed to just guzzling gin from the bottle, is a function of how cold you can get your mixture, certainly not how much Vermouth you do or don’t add.
This combination of glassware won’t do anything to help lower the temperature of either ingredient. Refrigerating your gin in a flask simply isn’t sufficient, it must be combined with ice, shaken vigorously and strained—there’s no way around it.
How much Vermouth you add, is your business—less isn’t always better.
RayF"What makes a Martini taste good, as opposed to just guzzling gin from the bottle, is a function of how cold you can get your mixture, certainly not how much Vermouth you do or don’t add."
Given that whether something tastes good or not is subjective, than the amount of Vermouth you add would have a big difference on whether or not you think think a Martini tastes good. No? Unless you're implying that Vermouth does nothing to the flavor of the Martini?
I'd argue that both amount of Vermouth and temperature are important factors in creating a Martini that's pleasing to the individual drinker.
"How much Vermouth you add, is your business—less isn’t always better"
The fact you have an opinion on how much to add shows that it does have an effect. Unless you like the taste regardless of the amount of Vermouth so long as the temp is where you like it?
The issue is temperature, not Vermouth. What you add to yours, or how much, is no concern of mine.
Pointing out the products in this drop do nothing to assist in the preparation of good Martini, is more to the point.