I know exactly what you mean. We had 4 thermal and 2 non-thermal. Worked out great. Then we discovered that none of them fit in the cupholder of his stroller, so I bought a couple in a different brand. Then Grandma got him a personalized one. Now we're trying to switch him to the valveless ones, so I bought some Take N Toss, some with spouts, some with straws. They've taken over! I'm weeding sippy cups (and toys!) before the weekend is over and boxing them up.
We have 12 (I think, maybe only 10), but that's between 2 toddlers. They would probably have more, except that I think they take up too much cabinet space already, and I do dishes once a day, and rarely every other day, so there are always some clean.
We have a TON! We have probably 10 or 12 take and toss cups, 4 playtex cups, 2 nalgenes and a couple other Nuby ones that I only use for water when we are traveling... that is for 2 toddlers and sometimes I feel like its too much... other times like its definitely not enough!
I have 4 regular sippy cups and 2 straw cups. That is plenty for us. I don't even use all of those and have thought about only keeping 2 of each. I do dishes daily. During most meals she now has an open cup. For those I have some smallish plastic cups. I have probably 6 of those but I have 3 kids that use them.
I have 5 Munchkin cups with the silicone sipper, one with the plastic sipper, 3 with some kind of straw, 1 insulated cup and 2 short cups with double-handles. RIDIC.
I have twins, so I have to have more than I would like. Right now each girls has 4. So 8 total. Oops forgot their straw cups they use for water when we are out of the house. So 10 total. Man, I will be so happy the day we are sippy free. But I don't see that happening for a while.
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For TK (3) I have none, but he has 3-4 water bottles for the car/zoo/etc and he only uses cups at home... I have 5 straw ones for Khari (10months) and like 3-4 spout ones, but she won't drink out of those ones...
Re: how many sippy cups do you have? POLL
I have about 4 sippies, 6 straw cups (that are always missing some part) another 6 take and toss and 4-6 "trainer" plastic cups.
My mom keeps buying DD personalized sippy cups or Dora cups or something.