Nseen
MIT researchers Jiani Zeng and Honghao Deng have developed a "truly minimalist", 3D-printed flacon, which is entirely transparent at first glance and only reveals its branding when it is tilted at just the right angle.
If the Nseen bottle was standing in front of a sign, onlookers would be able to see straight through it to read the words behind, without being able to see the writing on the bottle itself.