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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🍼 Pump, store, and nourish with confidence — the ultimate milk storage solution!

HASSLE FREE CLEANING - Dishwasher safe and compatible with Quick Clean Micro-Steam bags for effortless sanitizing.
LEAK PROOF SOLID LIDS - Secure storage that travels well and keeps milk fresh without mess.
BPA FREE PEACE OF MIND - Crafted from safe, non-toxic materials prioritizing your baby’s health.
PRECISION VOLUME MARKINGS - Clear ounce & milliliter indicators for confident milk tracking every time.
SEAMLESS MEDELA COMPATIBILITY - Direct pump-to-bottle convenience eliminates spills and extra transfers.

This 6-pack of 5oz (150mL) breast milk storage bottles is designed for busy, health-conscious moms using Medela pumps. Made from BPA-free plastic, these wide-mouth bottles feature clear volume markings, leak-proof solid lids, and are dishwasher and microwave safe, ensuring safe, convenient, and hygienic milk collection and storage.

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AR$61110

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Product Dimensions	7.3 x 5.5 x 4.7 inches
Item model number	87095
Is Discontinued By Manufacturer	No
Target gender	Unisex
Material Type	plastic bottles
Material Composition	Plastic
Material free	BPA Free
Care instructions	Dishwasher & microwave safe
Additional product features	Leak Proof, Wide Mouth
Number Of Items	6
Style	Breast Milk Bottles
Batteries required	No
Dishwasher safe	Yes
Bottle nipple type	Medium-flow
Bottle type	5 oz, Wide Mouth, Reusable
Is portable	No
Item Weight	5 ounces

Breast Milk Collection and Storage Bottles with Solid Lids - 6pk/5oz-150mL Breastmilk Container, Compatible with Medela Breast Pumps and Made Without BPA

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