How to Get The Sour Milk Smell Out of Plastic Sippy Cups

So have you ever found a sippy cup like this in your house? Want to know how to get the sour milk smell out of plastic sippy cups?


Yes that is what you think it is, solid chunky milk. I have found these little gems under my sofa, under the car seats or sitting in my sink when I was being a lazy dish washer. My dishwasher has a sanitizing option so the cups will get really clean but some times you can’t get that stinky curdled mil smell out of the plastic. What do you do? Let me guess……you throw the cup away.

Well my friends no more, and you won’t believe how simple the solution is…you put the cup in the freezer over night after you wash it and the smell will be gone in the morning. Yes it is magic and yes it really works. Try it and let me know if it works for you!

© 2012 Miss Information.  ALL RIGHTS RESERVED.

23 Responses

  1. I was told it's a HUGE NO NO to keep anything that has been sitting for who knows how long with spoiled/curdled milk in it. No dishwasher here to sanitize but even if there was one I would still be told its wrong. Even though I don't see what the big deal is about keeping it if you wash it really well.
    1. Not sure who told you but I now have a 9 and 14-year-old they both survived and are happy and healthy!
  2. Suzanne Winter says:
    wait, what!?!?!? That is it - freeze and wash.... I will be trying this!!! I've tried every combo of dawn, baking soda, HP, soaking in salt, etc......
  3. Bonnie and Trish @ U says:
    Where were you when my kiddos were tiny? That is a fabulous tip! Thanks for sharing with us!Take care, Trish
  4. Great tutorial! I love your monster graphic. Thanks for sharing on Marvelous Mondays!
  5. Kelley @ TheGrantLif says:
    I didnt know that! Im going to have to try it! Wow! Ps.. LOVE the new look Kelley! Your blog looks fantastic! :)
  6. I am so trying this! And by the way, I'm glad I'm not the only one to find sippies everywhere.Thanks for sharing at Terrific Tuesdays.
  7. I just found a stinky cup today! I've noticed that the smell doesn't always go away after running it through the dishwasher, but I didn't know what to do about it. Now I do! Thanks so much for the tip!
  8. Tutus & Tea Part says:
    Ahh, I always find random sippy cups around...and of course they always have curdled milk in them! Thanks so much for linking up to our Pinteresting Party! I am featuring this post tomorrow so come by and check it out if you can. This is so helpful to me! Thanks!
  9. Yes I have found these! Hopefully I will remember this tip when #2 starts using these and they get "lost" all over the place. Thanks!
  10. Christine says:
    THANK YOU for this tip!! I will be using it!!!Thanks so much for sharing this at The DIY Dreamer.. From Dream To Reality!
  11. Jessi Wohlwend says:
    Awesome tip! I wonder if it would work for plastic tupperwares too... sometimes we get weird dairy curdling action going on in those if we leave them sit around too long. Thanks for sharing at The Fun In Functional!
  12. Thanks for linking up @ CountryMommaCooks link and greet party.....hope to see you again tomorrow : )
  13. Jenny Melrose says:
    Great tip Kelley! I shared this on G+. Thanks so much for stopping over to Whimsy Wednesdays.
  14. I'm trying it! Thanks for sharing!
  15. Candy Ogg says:
    Wow. I wish I could say that I would never need this tip but I bet I try it before the week is over. Thanks!
  16. I would NEVER have thought of this! What a great tip!
  17. Earning-My-Cape says:
    I have thrown away sooo many sippys! I'm gonna have to try this!Visiting from a Pinteresting Party! :-)
  18. I'm a nanny, and just encountered two sippy cups just like this! It's a universal problem that you just solved!
  19. Kathy Penney says:
    im glad Im not the only one finding the chunky milk prizes! I will have to try this!
  20. Hi Kelley, Totally brill! What mom (or nana!) hasn't thrown away several sippy cups?? Awesome tip. Btw, I found your site through Happy Hour Projects tutorial on no-reply bloggers. New fan and follower:) Thanks, Di
  21. you're a genius! i just threw one out 2 days ago! thanks for the great tip! :)

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