Backpackers often buy small, lightweight containers to avoid lugging around full-size bottles of soap, condiments, sun screen and many other substances. Save some money by making airtight, waterproof and lightweight containers from the tops of two soft drink bottles. You'll probably find a use for these even if you aren't a backpacker.
Backpacking blogger JJ Mathes details the construction of these containers at the link below. All you need to do is cut two soft drink bottles just past the point where the screw-cap threads end and glue them together. If you want a two-compartment capsule, measure and cut-out a circular piece of plastic from the bottle's sidewall.
I especially like the idea of using the two-compartment capsule for salt and pepper or two different daily medications. These would also be great to bring cooking oil, garlic cloves and other cooking odds and ends when camping; perhaps even a couple of shots of your cordial of choice for a mountaintop toast.
DIY Capsules [Jermm's Outside]