They need handles included the ones on the small 360* fit them perfectly.The replacement parts come individual packaged. We started carrying these due to summer coming it’s popular with our workers as gifts to quarterly prizes.We tried on our own kid switched from Advent to Nuby for him.
Fun thing to do fish bowl put dots on the individual wrapped nipples/plugs let workers pull it out as their gift (All our workers have toddlers they voted on these) they count the dots on the bottom who has 7 dots instead of 6 gets an insulated cup! We have 2 winners so it’s a lot of hooting y hollering them after trading. We also use the 2in 1’s,2 packs,etc as gifts. Unlimited choices to colors designs.