We like to joke that they run off together and breed because we'll struggle to find any for weeks and all of a sudden we look under the bed and there's 10 of them LOL!
LOL our 2 yo DD was a classic for this. She would be down to one dummy after losing all the others, then she would disappear into one of the bedrooms and reappear with a new one!

I was finally prompted to get rid of them for good after she had once again lost them all and the dog chewed the last one. It was surprisingly easy - I told her that the dog had chewed her dummy so we have to throw it away, but to sweeten the deal the 'dummy fairy' left her a little present for being a big girl and saying goodbye to her dummies.

When my babies were newborn I would buy the more expensive ones, as they don't tend to lose them that easily when they are so small. But as they got older I would just buy the cheap 3 pack of tommee tippee cherry soothers. My kids didn't like the happy baby ones because they would always deflate.