I imagine a lot of us have that pattern of darkroom use!
I used to buy paper developer concentrate in 1 litre bottles, and drop in glass marbles to keep them neck-full as I progressively removed liquid. Nevertheless, there were occasions when I found the contents had turned brown with oxidation, and I had to abandon my planned darkroom day. But as already suggested above, you don't necessarily need to abandon the developer you prefer in favour of a Long Life formula.
Following excellent ideas from members of the
FADU forum, I now buy paper developer (Ilford Multigrade Developer in my case) in a 5 litre container, which works out much cheaper than buying 5 x 1 litre bottles. On opening, I split it into 4 x 1 litre brown glass bottles, and the remainder into 1 x 500ml bottle and 5 x 100ml bottles. Ilford Multigrade Developer is used 1+9, so each of these 100ml bottles makes 1 litre of working solution, which is what I use for 16 x 12 paper. Each bottle is topped with a brief squirt of butane lighter gas. I bought the bottles from a laboratory glassware supplier, via eBay. When I have used all 5 small bottles, I break down the 500ml bottle, and when that's gone, I split down the next 1 litre bottle. This system has worked amazingly well for me.
If I want to keep working strength developer from one day to the next, I pour it into a glass bottle and give it a squirt of butane. Again, that works well, although generally I prefer to make up a fresh solution if the break is longer than a day or two.