Best reusable gel flasks

[Schmiken]

I use these:

High5 Empty Gel Flask £1.99 at Dolphin Fitness

Cheap, easy to clean and hold about 2-3 gels worth.

I also make my own gels, using this recipe:

Make Your Own Energy Gel (With Chia Seeds!) | No Meat Athlete

I’d be very interested in how you might adapt this @Jonathan!