Time machines are twice as efficient. "Bake to the future."
Time paradox resolver
Time machines are twice as efficient. "No more fooling around with your own grandmother!"
Time machines are twice as efficient. "There is only one constant, and that is universal uncertainty. Or is it?"
Time machines are twice as efficient. "What happened, happened."
Time machines are twice as efficient. "Fortnights into milleniums."
Far future enactment
Time machines are twice as efficient. "The far future enactment authorizes you to delve deep into the future - where civilization has fallen and risen again, and cookies are plentiful."
Great loop hypothesis
Time machines are twice as efficient. "What if our universe is just one instance of an infinite cycle? What if, before and after it, stretched infinite amounts of the same universe, themselves containing infinite amounts of cookies?"
Cookietopian moments of maybe
Time machines are twice as efficient. "Reminiscing how things could have been, should have been, will have been."
Time machines are twice as efficient. "That's twice as many seconds in the same amount of time! What a deal! Also, what in god's name!"
Additional clock hands
Time machines are twice as efficient. "It seemed like a silly idea at first, but it turns out these have the strange ability to twist time in interesting new ways."
Time machines are twice as efficient. "Your time machine technicians insist that this is some advanced new time travel tech, and not just an existing emotion universal to mankind. Either way, you have to admit that selling people the same old cookies just because it reminds them of the good old times is an interesting prospect."
Two images from the Classic version, left: icon shown in the store, right: appearance in the middle field
The Time machine was introduced in the 0.125 update. It costs 123,456,789 cookies, and is the most expensive of all the items, at their base levels. It produces 123,456 cookies per 5 seconds.
Adding 24,691.2 CpS (cookies per second), it is approximately 18.5203 times quicker than the Portal. It also causes some grandmas to wear a pink jumpsuit with a visor, a hover board, and a green rolling pin, leading to the assumption that these grandmas came from the future.
Images from current version, left for menu, right for in-game appearance
You need at least 15 Time Machines to purchase the "Grandmas' Grandmas" upgrade.
The Time Machine is based in Marie-Antoniette Watch
A time machine is a fictional machine used in numerous works of Science Fiction; the revamped in-field icon loosely resembles the clockpunk designs used in films based on the novel The Time Machine.
Until v2, when the prices and yields were readjusted to account for the new buildings, all of the base costs and yields associated with the Time Machine were made up of sequential numbers, counting forwards from 1 to 9, backwards from 9 to 1 or even from 9 down to 4 then up to 9 again.
The "Flux Capacitor" upgrade, as well as its flavor text ("Bake to the future"), are references to the 80's classic film "Back to the Future."
The "Quantum Conundrum" upgrade and its flavor text are a reference to the 2012 video game of the same name.
The flavor text on the "Time Paradox Resolver" upgrade ("No more fooling around with your own grandmother") may be a reference to the show Futurama episode 51 ("Roswell that Ends Well") or to the famous grandfather paradox.
The achievement "cookie clicker forever and forever a hundred years cookie clicker, all day long forever, forever a hundred times, over and over cookie clicker adventures dot com" is a reference to popular cartoon "Rick and Morty"
The Achivement "Heat Death" is a reference to a theory on how the universe might end. "Heat death" is what the state of the universe is when the last star collapses and all we have are black holes and darkness.
The Achivement "Groundhog Day" is a refrence to the 1993 movie of the same name.