When you're building up your stash, it's tough to find a better freezer option than a 32oz Hydrapeak (Amazon - $22.95) paired with silicone inserts (Amazon/Etsy/TG makers - $14-25). They stack up quickly, don't hog much room, and if you want to keep the contents private, they're practically unnoticeable.
Other "food jar" brands exist too. Just one warning from me: skip the ThermoFlask versions - their sides aren't flat; the lid's threaded section is recessed by roughly an inch. The good silicone inserts won't fit. :-/
Other "food jar" brands exist too. Just one warning from me: skip the ThermoFlask versions - their sides aren't flat; the lid's threaded section is recessed by roughly an inch. The good silicone inserts won't fit. :-/