Aonijie 170ml Gel flask for nutrition  carrying on the go.  Fits equivalent of 6 Gu Gels.

Aonijie 300ml Gel flask for nutrition carrying on the go. 

Combining versatile utility, ultra-lightweight design, and eco-friendly ethos: This flask holds energy gels, water, or electrolytes with a cross-seal and press-spout that prevent leaks and simplify access to thick gels. At just 22g, its TPU+PP+PE+Silicone build is flexible, durable, and food-safe, making it virtually 'weightless' when folded."