They looks so fine, but sometimes are they unfortunately leaking. I have pain in my hands and are not that strong. So I guess that that can be that I don't have the power to tighten the cap.
The new bottle cap works well and I’m glad that you sell them so that a new bottle doesn’t have to be bought when the cap doesn’t work. :)
Caps are fine, however I just needed the silicone ring as the old one was moulding. I asked for one but was told by yiur team that I needed to buy a while new cap, which for me was waste as my cap fine. I tried to recycle the cap but when I went to order a new cap online you also had an availability to buy single silicone rings. I would have liked that your team would have told me that this changed as I was in contact with them about the rings earlier. So my waste grew, I threw away a perfectly working cap and had to buy a whole new one. And I got two, which was also unnecessary.
Without any problem, very satisfying.