See pics below.
PodiumQuest aerobottle is great, with two compartments for water + sports drink. Has been used in racing 3 half IMs and one full ironman. Velcro is coming apart a bit, but fully functional.

Xlab flatwing holds 2 water bottles behind the seat. Two bottle cages included. Has been used, but fully functional and no worse for the wear.

Make me an offer!
PodiumQuest:


Flatwing: