What are the outside measurements and total weights of the different sizes?

Do not know about all sizes. Mine is approximately 7x5x4 . The weight depends on how many "heaters" you take. Empty weighs 12.6 oz and heaters are 2oz each. This is good flameless cooking method but the heaters make a bit impractical for too long a trip. I stow mine with 6 heaters inside and use only when necessary. ie, can not build fire.

Where can i find recipes for barocook rectangular flameless cookware system? maybe a cook book?

I don't believe there is a cookbook available other than instructions on the packets.

Can you cook a thawed out hamburger in this?

Yes you can. But you need to use more than one packet to do it. I used Barocook for every meal for a week after a hurricane. I boiled water, cooked raw food, etc. Two of the large heater packs does it. I've also taken rock hard frozen food and cooked. You need some liquid to help transfer the heat.

Does this process produce an odor or smell -- aside from the food being cooked? (like a toxic chemical emission?)

I didn’t notice an odor or smell when my daughter and I used it. It didn’t set off my air purifier’s alarm or my carbon monoxide detector.

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Barocook Rectangular Flameless Cookware System

Barocook Rectangular Flameless Cookware System

Product ID: 15422508

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🔥Flameless heat up to 208ºF

🥾Compact & lightweight for on-the-go

♻️Eco-friendly water-activated heat packs

Description

🔥 Heat your hustle, anywhere, anytime!

SUSTAINABLE SAFE - Eco-friendly, non-toxic heat packs activated by water—good for you and the planet.
TRAVEL READY DESIGN - Lightweight and compact, fits effortlessly in your backpack or office bag.
PREMIUM BUILD QUALITY - Durable stainless steel inner bowl with BPA-free outer shell ensures safe, long-lasting use.
PERFECT PERSONAL PORTION - 850 ml capacity tailored for individual meals, ideal for busy professionals.
FLAMELESS HEATING FREEDOM - Heat your meals anywhere—no fire, gas, or electricity needed.

The Barocook Rectangular Flameless Cookware System offers a portable, eco-conscious way to heat meals without fire or electricity. Featuring an 850 ml stainless steel container and water-activated heat packs, it delivers up to 208ºF of heat for 40-60 minutes, perfect for professionals on the move who demand convenience, safety, and sustainability.

Specifications

Item Package Dimensions L x W x H	7.68 x 5.55 x 4.88 inches
Package Weight	0.6 Kilograms
Item Dimensions LxWxH	8 x 6 x 4 inches
Item Weight	0.4 Kilograms
Brand Name	Barocook
Country of Origin	Republic of Korea
Material	Stainless-Steel
Manufacturer	Barocook America Corporation
Part Number	BC-003-D
Model Year	2013
Size	28-Ounce

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