I actually used a non-locking vitamin supplement bottle with a piece of tape over the threaded lid for backup.
I’ve considered using locking prescription bottles but haven’t yet and wondered the same as you. I’ll update next time I try it.
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I dissolve the powder first. And pour the really thick gel into a reusable flask. (https://tinyurl.com/46yu2nyp)
No worries about ripping bags, getting messy powder everywhere.
Also means I can either use directly as gel or pour into a bottle when stopped at a cafe and dilute with water.
So I might be out of water but I’m never out of food
Use warm water out the tap and it dissolves in less than a minute with a bit of stirring.
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What size of handlebar bag are you using? Ive been thinking about getting one
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This is very interesting! I have a few hydra paks for doing longer rides in the summer - mine are the full-size ones; I never considered getting small ones!!
How many grams of carbs can you get diluted into that flask? I like the idea…
This is the ones I have. 15% off with email.
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Many thanks 
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I use the tubes from these, once I’m done with them. Dissolvable VitC/multi Vits come in similar packs. A lot less messy than the ziplock bags, I find.
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I was able to put 600g carb + 6000mg Sodium in a 1L bottle Then just carried extra water
I found the ziploc bags were too messy. Always ended up with sticky hands and bottles. I use my old vitamin containers. They are wide mouth and easy to fill with a funnel and dump into a water bottle. Never had an issue with the snap-on lids coming open. Certainly bulky to carry the empty ones back home but I think it’s worth it to avoid the mess.
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I make my own bags with a vaccume sealer. The bags typically come in the form of a roll and you use the sealing function of the machine to make a seam, allowing you to make bags any size you wish. I make them different shapes depending on where I plan to cary my drink mix and what works better in that scenario. For example I’ve found packets shaped like a cell phone fit in a jersey well while longer skinny ones work better for my top tube bag. The highlighter is in there just for size reference.
A tip for this method is to make a small cut with scissors so you can easily tear the pouch open. Also mark it some how so your not searching for it later. Second tips is to use a protein shaker bottle as a funnel to pour the powder into the pouch before you seal it.
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I tend you use the 250ml flask. And if I’m trying to max out the concentration I typically use:
100ml of water to 250g of carbs 2:1 (MD:Fructose).
Which puts the total volume to slightly under 250ml
So for me that’s good for 5/6 hours with 2 full bottles already on the bike and 1 stop for water
This, 100%. Exactly what I do.
Don’t know why I didn’t think of buying those bags off Amazon. Good pricing too. I’ve been buying them from a bulk packaging supply company for roughly the same price per bag at QTY 1000 
.
tested this before ordering ice pop bags - will do the job, over 2 tubes per bottle. Must have been going a much lesser ratio/ matching sis the last time I had to do it! 40g of malto fits in the vit c tube, albeit a couple of taps/ bangs to get the air out.
Tell you how it works out over 100km of gravel after next weekend!
similar here - I use old Nuun containers for various purposes including carrying things on rides.
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Well you’ll know for next time!
Small change over traditional zip locks with big practical improvements! Great idea. Anyone able to fit ~100g powder into these or is ~70g the functional limit?
The initial link I posted is good for 70g + 6g sodium citrate. I chose 70 so I could add a gel per hour in case I wanted the flexibility of 70 vs 90 or if I wanted to add caffeine via a gel. I typically reuse them 4-5 times depending on how clean I can keep them.
For a 100g I would go up to something like this;
Love it - thanks for your input!
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