Best bottle we have found. We tried others and found not only that others are mostly square and hard to hold, they also are not vented which when the calf nurses on the bottle it pulls a vacuum so you are constantly opening the top to equalize the pressure so the calf can get more milk. THIS ONE HAS A VENT that takes care of that issue. It also has an hourglass shape and a handle which makes gripping much easier. It has openings on both ends which makes cleaning a snap. The only negative was I had to do a search on how to get the one way valve out of the nipple and of all places I found it on a product review on the largest e-commerce company in the world. It starts with an "A". Very easy to do after you know the trick. For some reason TS didn't like my review with that other company name and kicked it back.

This bottle is junk because the screw on bottom cracks. If you tighten it tight it cracks. If you dont tighten it tight it leaks. I guess I am not a very smart man because I have bought six of them and all but one the lids have cracked. I kept thinking it was just a bad lid. Stay way from these.

good shape for person to hold

I’ve had bottle calves off and on for years and went to tsc and this was only type available in store.  Bought it and wow!  What a difference.  No leaking once I got the cap on right and baby had a much easier time figuring out how to use it.  The cap is tricky.  It has to be lined up perfect and screwed on tight!