Amazing! I bought 4 of the 100 mls with pump lids for a holiday abroad over 6 months ago. I love them, they’re the perfect size for an airline toiletries bag or your hand bag. I’ve refilled them many times since purchasing because they come with me on weekends away, to the gym and sometimes to work. No signs of wear and tear yet. The pumps twist to close and don’t leak. These are such good quality, miles better than any plastic or silicone bottles I’ve had before for this purpose. I will re-purchase these if I’m ever in need of more or if my current ones ever break.