If like me you cycle in all weathers you might occasionally need something to store items inside that would otherwise be exposed to rain. I have used various pouches but by favourite has always been the simple and inexpensive 'Caddy Sack' by Lezyne.
As you know I regularly participate in night rides typically 60 - 70 miles. On these I rarely take one of the many Brompton bags that are waterproof. Despite my phone now being waterproof, one rides where the rain constantly comes down, I do put my phone and small wallet into one of these. I also have a mechanical watch that although possessing some limited waterproofing, I will always put into one of these just in case on the rare occasions I am wearing it.
They are very effective and give the utmost confidence that whatever inside will remain dry. Being quite small they easily fit into a jersey or coat pocket and also into a saddle bag.
They will typically set you back £8.99 for the medium version but shop around and you might be able to get one as I did for £3.99.
Until next time, stay safe out there people!