For about 10 bucks, you can buy a bottle cage for your bike that weighs an ounce, or 28 grams. However, if you've got €380 (USD $411) burning a hole in your pocket, you can step up to this Superleggero bottle cage, which weighs just 14.7g.
Made by Alpitude Bike Components, it's billed as "The lightest 3D-printed Titanium bottle cage in the world."
Before you say "Who in the world would spend that," it's worth noting that they only made 99 units, and at press time just three were left.
Fun fact: For competitive cyclists, there's a website called Weight Weenies: Every Gram Counts that lists the precise weight—both manufacturer-claimed and actual--of various bicycle components. As an example, they list over 100 bottle cages. Those folks take this stuff seriously.
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