Are there scuba diving fans in the room? Because we advise you to take a look at this: a scuba tank far from invasive, since it is portable and recharges in the hand in a few minutes.
The project is called MiniDive Pro, and it is the work of a French start-up: SARL AIRSCPE, based in Puy-de-Dôme. The concept: a portable, lightweight scuba tank that can be recharged at sea using a hand pump (supplied with the bottle) or a mini compressor (optional). Obviously the MiniDive Pro does not allow expeditions of more than 5 or 10 minutes, but it is sufficient for Sunday divers, for emergencies or for long expeditions, who cannot necessarily refill traditional bottles. In addition, the device has a lightweight harness for quickly putting on and taking off the device.
MiniDive Pro was the subject of a crowdfunding campaign on Indiegogo which was funded at over 430% of its original target.