This picture looks like one of those Instagram concept bikes that are made to look oh so speedy. Its like a car that a 10 year old boy would think is awesome. The look of pure speed, but years is knowledge later realizing it's all show and no go.

But bonus points for the Power Bar tattoos. Ads will always find a way

Which doesn't include "folding" it, for aero advantage (if any in first place).
The 2024 IRONMAN Rules have been published (wef 6 March) and the relevant section is:

5.01(m) Except as set forth below in Section 5.02(b) [actually IM may have wanted to refer to 5.03(b); below but it's not clear (5.02(b) refers to helmets)], additional equipment that has the effect of reducing wind resistance is prohibited during the bike segment of the Race (whether such equipment is worn under the athlete’s clothing, over the athlete’s
clothing, or is otherwise attached to the athlete's body or the athlete’s bike). This
includes, but is not limited to, (i) any bottles/hydration or any other insert located in
the front of an athlete’s race suit and (ii) any insert in an athlete’s calf sleeves; (DSQ)

5.03(b) Protective screens, fuselages, fairings, or any other devices or materials (including
duct tape) added or blended into the structure with the intent to reduce (or having
the effect of reducing) resistance to air penetration are prohibited. Aerodynamic
assemblies and protuberances on the head tube or elsewhere are prohibited; (DSQ)

This rule implies that temporary storage of a bottle in a pocket or down the front (see Sanders at Oceanside) will risk a DQ. And chucking outside a litter zone will mean DQ.

The bike hydration manufacturers have won the war.

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-Of course it's 'effing hard, it's IRONMAN!
Team ZOOT
ZOOT, QR, Garmin, HED Wheels, Zealios, FormSwim, Precision Hydration, Rudy Project

You're a high roller. I'll take my $3, 1.5L Smartwater bottle w/drink tube out of the collar of my kit and... recycle it now, I guess. Maybe I can save enough pennies from non-existent water bottle recycle payments (do they even still do that, at a nickel each?) and buy a new $4k+ frame with integrated hydration. Politics suck.

Yep and now instead of my 1.5L bladder I also had used for camping now I can hammer $100 more bucks to Profike design for more bottle cages behind my seat to make up for it. This rule is as dumb as my race pics in the bike look with the bladder.

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-Of course it's 'effing hard, it's IRONMAN!
Team ZOOT
ZOOT, QR, Garmin, HED Wheels, Zealios, FormSwim, Precision Hydration, Rudy Project