https://www.topeak.com/global/en/product/329-WEDGE-DRYBAG
I ordered this in large. I forgot I had it in medium stashed in my garage. The medium was larger than I wanted for everyday use but can’t fit tools and rain jacket. I think the large will be enough to accommodate. I didn’t want to go gigantic but just large enough to include tools and jacket
I’ve always been interested in this one. FASTFUEL TRIBAG | Topeak
Would like a little more capacity than my current one TRI FRAME NUTRITION POUCH - black - Van rysel - Decathlon
Did I miss something or has nobody linked the Tailfin ones here yet?
https://www.tailfin.cc/category/small-packs/top-tube-bags/?v=79cba1185463
They’re expensive but not ridiculous compared to a lot of other ‘premium brands,’ and I don’t think any other company gives you as much choice or quality in their offering.
Choice of ‘flip top’ or zip.
3 sizes in zip, 2 sizes in flip top.
All options can convert between strap and bolt-on(!)
Decent waterproof, minimal but functional internal structure.
But for me the standout feature of any strap-mount bag from Tailfin is their rubberized ‘V-mounts.’ I’ve now got them on a couple different kinds of tailfin bags and in terms of stability nothing else out there even comes close. Once lashed down those things just don’t move. I’ve never had that with any other bikepacking bag. I probably still wouldn’t strap them straight onto an unprotected carbon frame for off-road use, but I trust them enough to just use a single layer of electrical tape (instead of the hardier heli-tape kind of stuff that I’d always felt the need to use before).
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I’ve been using the Apidura bolt on one for my winter/bikepacking bike for a few years now for everyday use and am really happy with it. Nice and streamlined and the bolt fixings make it totally solid. But for bikepacking I wanted another option that maxes out available space there so I got the biggest Tailfin one. I’m pretty small (172cm and 52-54cm frames) and have had knee clearance issues with some other options but even this massive Tailfin unit stays clear for me which is impressive - the teardrop profiling is really well shaped.
At some point I may also get the smallest 0.8L zip version too so I’ve got a tidy streamlined option at the other end of the spectrum (since my Apidura won’t fit my non-bolt bikes).
Tailfin customer service is pretty good too - they’ve sent me spare/replacement parts for my aero pack when they didn’t need to and they still seem young and small enough that they’re genuinely curious to get customer feedback on what issues we come up against when using their stuff in anger.
I know I sound like a brand ambassador. I wish I was, but I pay full price.
I use this Apidura as well.
I got it because I wanted screw in and it’s thin while still being fairly large at 1L. I wanted a top tube bag on my gravel bike build instead of a handlebar bag because I wanted to access stuff like my phone or food on the move. I’m also small at 167cm using a 52cm frame. I had my first big ride with it earlier today. Because the frame is small, my knees can hit the bag while I’m out of the saddle but not enough to where I consider a hindrance. Otherwise, it performed great.
Just received the new Uswe top tube. Ag today. Quality is good. Was confused at first as it has a fleece liner which I found weird. But it’s easily removable and instructions say it’s to protect electronics. There’s a tiny mesh pocket inside. Maybe you’d put a credit card in there or money.
I was able to put 9 gels in there which include the larger e-gels without trouble. I’d probably take a couple out as with just 7 in there the magnetic enclosure flipped over more easily.
Will install and ride it this weekend. Bit good first impression
After looking at a multitude of >1L top tube bags, I pulled the trigger on an ALMSTHRE bag (admittedly influenced by my existing ALMSTHRE seat bag). So far it seems perfect for snacks during long rides and races.
Full capacity…1 protein bar, 2 packs energy chews, 11 gels. With that much it’s pretty round, but the zipper is still smooth. I don’t realistically expect to need that much for a race/event.
I did the same for the same reason. I had a BWR ALMSTHRE saddle bag so went with their top tube as well. It’s big enough to hold a lot of gels. It will fit my phone. There are 3 small pockets inside. I plan to use one to hold a Dynaplug for quick access.
Be sure to tell your buddies those straps on the side are turbulators designed to disrupt laminar airflow for a 6 watt savings vs no bag. 
