I use screw cap bottles and bottle from the keg. If you do it right, they hold carbonation just fine. And they are inexpensive enough that if you lose the bottle, no problem. I do use a new cap if I plan to keep it more than a few days. Putting the caps in very hot water softens the polyethylene seal allowing for excellent long term sealing.After cleaning and sanitizing bottles, and going to kegging, I swore I would never go back. But was it really that much effort? Maybe nostalgia is picking at me a bit now, but it was easy to share bottles with friends.
https://www.bottlestore.com/32oz-amber-boston-round-glass-bottle-20-pack-33-400-neck.html
Just one example, you may even find them cheaper. Be sure to buy extra caps, the cone type, which pushes out extra air.