Best reusable gel flasks

Okay I bought and have used the collapsible bottles. The bottles are perfect, but the opening for dispensing is too small. I thought there would be more residue left in the bottle, but you can get 3 or 4 good squeezes of gel with the bigger opening.

I bought these and swapped the tops. The Timiuu have a much bigger dispener opening so when you squeeze you get a nice shot of gel.