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Comment by eitally | Hacker News Reader

For Americans: mason jars come in a plethora of shapes and sizes, and are dirt cheap. :) I use a quart size as my water glass and we bought Cuppow sippy lids in both diameters to make them easier/safer/neater to use in challenging situations (cars, kids).

Cuppow: http://www.amazon.com/s/ref=bl_sr_kitchen?ie=UTF8&field-bran...

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Second for the mason jar train. I prefer the wide mouth 1.5 pint variety. You can safely freeze, bake, and nuke these suckers, and I do.

I bring my coffee into work every day in one, then I rinse it and drink water or tea out of it until I go home. I have a few in the freezer full of curry right now, and a couple in the fridge pickling some daikon and carrots for bahn mi.

As long as you don't constantly drop them (I have yet to break one, and I've been using them for years) you can get a ton of use without ever worrying about what they might be doing to your food.

(edit: this is not a referral link, just showing the variety I prefer.) http://www.amazon.com/Ball-Jar-Wide-Mouth-Bands/dp/B00B80TJL...

Thanks, I also love mason jars. I hate to point it out, but isn't that Cuppow product also made of ambiguously "BPA Free" plastic? Better than an all plastic container anyway.

That's a great idea! I like their small pots that fit in top of a canning jar - to allow people to carry vegetables and humus.

Those glass jars are, however, heavy. I'm already transporting 15 kg of child, plus stuff. Is the additional weight of a heavy glass drink container worth it?

(I also like that these are not "valved" cups, but are "free flow". "Valved" or "no spill" drinking cups for children can cause ear problems.)

do they fit in car cup-holders?

16oz Ball Jars, I prefer the wide mouths, will fit perfectly in most cup holders. I've got it next o an Arizona Iced Tea can and it's only a little bit larger.

I just wasted a ton of time and energy measuring the circumference of each item and the ball jar is about 1" larger. The Arizona can was a rough 9.5" making the ball jar 10.5"

If you have an easier time visualizing diameters, that's 3.02" for the can and 3.34" for the jar.

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