Leak-proof small insulated milk container recommendation for my daughter’s lunches to save money?

[u/Pretend-Read8385]

I keep wasting money on individual milk and juice boxes because every container I’ve tried leaks and ends up making a mess in her backpack and ruining her papers from school.

School lunch is free, except she is picky and won’t eat it and you can only get milk if you take the whole lunch. It’s ridiculous, but it is what it is.

Ideally, I’d like one container with milk for lunch and another for juice with her snack.

She’s 10 and cool now, so no rainbows or unicorns.

Links would be appreciated. TIA

[u/unassuming_angst]

You could also use 8 oz mason jars (jelly jar size). They're very durable glass, and won't leak at all if screwed on properly. An environmentally friendly choice as well!

[u/JustNKayce → u/unassuming_angst]

I suspect that it is the proper installation that i part of the problem. What OP has offered as previous solutions have failed but I suspect it's because a 10 YO is not focused on making sure it's on right and tight. TBF though I am a grown ass woman who has definitely put the lid on my water bottle on correctly and it still wants to drip a little. It's annoying!

[u/Pretend-Read8385 → u/JustNKayce]

Yes, user error is most likely part of the issue.

[u/JustNKayce → u/Pretend-Read8385]

So what you’re saying is we need a kid lid. One that locks and won’t leak no matter how bad they half ass putting it back on!

[u/blahradbetchy → u/JustNKayce]

Happy cake day!

[u/theberg512 → u/Pretend-Read8385]

Could you possibly double up and put the drink container in a zip lock, so if it does leak it doesn't get all over everything? I always do this when I think whatever I'm packing might leak.