are these compatible with calma nipple?

According to the description they are, but I did not try a calma nipple myself.

What parts do I need to use with this bottles? A collar and a nipple?

Yes, if you wanted to use these bottles for more than just collection and storage you will need the collar and nipple. We have used the medela collar/nipple and also the regular Dr. Browns collar/nipples fit.

how many hours does it take to thaw frozen breastmilk in the refrigerator using these medela bottles?

It typically takes us about 8 hours to defrostin a refrigerator but you can also run these under cold water. Never defrost under hot water because it creates improper heat distribution. You can spoil the milk in direct contact while the core is still frozen.

does it come with the box? any sterilizer bags as the bonus?

Yes, the six bottles are in a box. And in the box there is an extra plastic bag, the bottles can be put into it, then you can sterilize them in the microwave oven. It seems can be used for twenty times.

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Breastmilk Collection and Storage Bottles, 5 Ounce, 6 Count, Plastic, Yellow

Breastmilk Collection and Storage Bottles, 5 Ounce, 6 Count, Plastic, Yellow

Product ID: 64775874

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Details

Brand
Medela
Bottle Type
Standard
Colour
Yellow
Capacity
147.87
Product Dimensions
14W x 11.9H

🍼5 oz capacity per bottle

🧼Dishwasher & steam bag safe

♻️BPA-free, safe for baby

Description

🍼 Store smart, feed confidently—because every drop counts!

COMPACT DURABLE DESIGN - Lightweight, reusable bottles in vibrant yellow—stylish storage that keeps up with your busy life.
PRECISION VOLUME TRACKING - Clear ounce & milliliter markers let you monitor milk intake with confidence.
ULTIMATE SAFETY ASSURANCE - Crafted BPA-free to protect your baby’s health and your peace of mind.
EFFORTLESS CLEANING ROUTINE - Dishwasher safe and compatible with Quick Clean Micro-Steam bags for hygienic reuse.
SEAMLESS PUMP COMPATIBILITY - Fits all Medela pumps for direct milk expression—no spills, no fuss.

Medela’s 5-ounce breastmilk collection and storage bottles come in a convenient 6-pack, designed for seamless compatibility with all Medela pumps. Made BPA-free for safety, these durable yellow bottles feature clear volume markings and are dishwasher and steam bag safe, ensuring hygienic, hassle-free use for busy, health-conscious parents.

Specifications

Brand	Medela
Bottle Type	Standard Bottle
Colour	Yellow
Capacity	147.87 Milliliters
Product Dimensions	14W x 11.9H Centimeters
Product Care Instructions	Dishwasher Safe
Number of Items	1
Theme	Baby
Reusability	Reusable
Shape	Round
Material Type Free	Bisphenol A (BPA) Free
Style	Compact
Net Quantity	6 Count
Package Information	bottle
Item Weight	222 Grams
Manufacturer	0
UPC	020451870953
Global Trade Identification Number	00020451870953
Model Number	87095
Target gender	Unisex
Pump type	Manual
Batteries required	No
Dishwasher safe	Yes
Bottle nipple type	Angled
Is portable	No
Item model number	87095
Country of Origin	USA
Item Weight	222 g

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