You have taken the photos a little underequipped. Not bad, I have succeeded with a phone mostly worse.
Other user's already have given some quidance on how to take the photos, but check this, too:
Removing backgrounds from product photos
Altough it's Photoshop-centric story, there's still surely something useful which is not connected to any software.
Back to your current problem.
At first stretch the contrast to the limit of overexposure. You do not have much room because you have bright highlights. Here's a screenshot that shows the situation and how much I added:
Removal of the background: I tested some easy methods to your photo with no succes. the contrast is too low and there's plenty of noise and JPG artifacts. The only way that went through streamlined was drawing a clipping path. That seems already well presented in other answers, so I show only the result. If you have 100 nearly as hard cases to clear, you can expect to need 15 hours pauseless intensive work until you have 100 pieces in this condition:
That calculation maybe gives one reason to enhance the photographing methods.
This is not good enough to a webpage. No matter, what is the background, it's not glossy enough to be attractive. You must increase the apparent sharpness and contrast.
One easy to understand method to increase the contrast without overexposure is to make a copy layer, increase its contrast and by layer mask hide the overexposed areas. Insted of the overexposed white is shown the previous version:
Merge the layers.
Sharpening is limited by JPG artifacts and because it generates white edges. An unsharp mask is applied. It's applied after merging the layers and making a copy layer for the sharpening. The radius was 1px and the amount = 1,00. The white edge outlines were mostly wiped off by the eraser.
How to be clearly seen against a white background?
No way, because the bottles are too nearly white. That is helped by adding shadows. The drop shadow below the stuff is stronger and tha back shadow is weaker. Both are blackened and blurred copies of the objects.They can also created by spraying black.
ADDENDUM: Before I noticed that you specifically asked about white background, I had made this whitened version for slightly colored background:
It can be useful to check if the total presentation plan allows other background than full white.