Review (5/5): Use more than once with proper cleaning, fits perfectly on Listerine bottles.
Works great in a Listerine bottle, AND ONLY A LISTERINE BOTTLE! does not work with other brands. My remedy is to purchase 2 Listerine bottles, and once they’re gone, I run through the dishwasher, and refill with comparable mouthwash from Costco. By using 2, I can refill one immediately while the other one is in the dishwasher.
The description says one-time use only. Definitely not one-time use at this cost!!! After each bottle of mouthwash, I pump hot water through the pump device to clean it out. Has worked well since I started using these.
The pump is especially useful for kids that use mouthwash. My kids always make a mess or leave backwash when getting mouthwash direct from the bottle.