I hate stopping on long rides. I hate running out of water. I don't like hydration packs on road rides. I don't own bike bags with water bladders (yet). I sweat a LOT.

Just passing this along in case it's useful to anyone.

All known bottles ≥ 30 oz (If you have any to add, please let me know):

• Zefal Magnum Bottles (32oz)
• SIS 1-Liter Bottle
• Polar 30-oz bottle
• Elite 950-mL Bottle (oh my goodness, my new all-time favorite, finally tried it this week [Jun-2022])
• Trek Voda 34oz bottle (promising.)
• Soma 38oz bottle (leaks when shaken. only use for plain water)
• Gatorade 32 oz bottle (not for bikes! not a fan of mouthpiece)
• NEW Zefal Magnum (975 mL) (meh)
• Zefal Magnum Pro (975 mL) (fine)
• Gatorade Insulated (30 oz) (not for bikes! not a fan of mouthpiece)
• Van Rysel FastFlow (950mL) (must be The Hulk to squeeze. Terrible)
• Specialized Team 32oz (not for bikes! Ironic for bike company named Specialized)
  
  
• Europe-only Isostar 1-L bottle (have not tried)
• Europe-only Powerbar 1-L bottle (have not tried, thank you @kajet for the find)
  

Honorable mentions:

• Trek Voda Ice (28oz insulated) (thanks @echappist)

Bonus... some cool cage systems if you're already maxing out BTA and BTS bottle carriage. Plus, these can hold 32-oz bottles with less ejection risk.

• Additional Universal ("SKS Anywhere") Bottle Cage Mount
• Lyne Components - Holy Rail
• Wolf Tooth Double Bottle Cage Adapter which mounts on Wolf Tooth B-RAD Mounting Base

Weight limits of all 3 of those systems far exceed their listed weight limits. Either that or I've just been lucky so far.
(no affiliation)

I posit that >95% of people's GI issues in training and racing ARE related to:

1. timing of hydration intake & overall hydration status
   or
2. glucose:fructose ratio management. Usually too much glucose.
   or
3. Complexity of carb source, usually turned to because of desired lower carb intake rate, decided upon because of erroneous belief they're intaking too much fuel for gut issue avoidance.
   

(or an interplay of the 3 above)

And NOT related to:

1. Excessive fueling.

Consider getting bigger bottles. It'll solve a lot of problems.

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Dr. Alex Harrison | Founder & CEO | Sport Physiology & Performance PhD
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