Hipsters gone too far: Why are people drinking booze out of baby bottles in Paris?

The general public has just about come to terms with a section of the culinary world's insistence that your dinner must be served on anything but a plate - slate, a trowel, a shoe - but the sight of fully grown adults drinking booze from baby bottles still has the power to unsettle.

Captioned by Instagrammer @theothernicryan, who took the photo, as the "worst thing I saw in Paris", this shot of people drinking what appears to be white wine or cocktails from baby bottles is a sign that gimmickry in the food and drinks industry have gone too far.

"A little restaurant full of people drinking actual drinks from baby bottles," wrote @theothernicryan. "Stood outside for about five minutes to make sure it wasn't some prank or filming for a French version of Nathan Barley. It wasn't.

"Stuff of nightmares this. Imagine meeting your mates and getting there late and not knowing what the restaurant was all about and seeing all your adult friends drinking like babies and just carrying on like it was completely normal."

A little research has led us to the Refuge des Fondus bar near the Sacré Coeur in Montmartre, apparently regarded for serving the "lowest-end table wine" in baby bottles.

However, the presence of a second bar that has its punters suckling its booze from a teat has emerged in the French capital - Le Zéro de Conduite, which makes its ability to cater for "those who forgot to grow" one of its main selling points.

The bar serves a rich variety of cocktails by the baby bottle - it's €16 ($A23) for the first order and €6 for refills.

Le Zéro de Conduite also encourages customers to draw artwork on white boards provided on tables and play board games.