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Oh Happy Day Mega Mug (40oz)
ETA: late jul

Coming Soon!


Oh Happy Day Mega Mug (40oz)

Mega sips, mega chills! 🧊 Have a cup of pick-me-up with this quirky collection of yellow smileys on a pale pink background.

Hydrating has never been easier with our 40oz Mega Mug! The cup holder friendly frame, comfort-grip handle and flexi-tip straw with a standard plastic straw base come together to create your new favorite Swig!


All of our prints are hand applied therefore slight variations will occur.

  • Holds up to 40oz
  • Keeps drinks cold 24+ hours and hot 9+ hours
    • Do not use the straw with hot beverages!
  • Comfort-grip, plastic handle
  • Triple insulation technology: double-walled, vacuum-sealed and copper-plated
  • Condensation free and nonbreakable
  • Constructed of .5mm 304-18/8 stainless steel
  • Fits most standard cup holders
  • Slip-free, scratch-free and noise-free silicone base
  • Includes BPA-free, X-Large Lid with removable slider for cleaning
  • Comes with BPA-free plastic straw with a removable silicone, flexi-tip

NOTE: Printed Reusable Straw Sets do not fit 40oz Mega Mugs

Use our Accessory Fit Guide to help find the right accessory for your Swig!


Measures: 9.9” H x 5.9” W (lid included)

Base: 2.9” in diameter

Straw: 11.81" L

Weighs: 1.21lb when empty


When caring for your Swig:

  • While this vessel is dishwasher safe, we recommend handwashing to maintain the best possible finish
  • Never use bleach or abrasive cleaners containing chlorine
  • Do not put in the microwave
  • Do not overfill with hot liquids and keep out of reach of children when filled with hot liquids
  • Always make sure lid is tightly secured before drinking

Looking for more care and use information? Click here for details on how to care for your Swig.

Customer Reviews

Based on 114 reviews
E.W. (Chicago, US)
My new fav Summer Cup

I told myself I would never buy a Stanley but I never told myself I would never buy a Swig and I am glad I didn't cave for a Stanley because I am obsessed with this cup. I use it everyday at work for my water cup and I am drinking more water because of it. It also keeps ice for 24 hours +. Highly recommend!

K.R. (Shannon, US)
Kind of disappointed..... Love the look of the cup though!

I received my 40 oz cup with the party animal design yesterday. I waited all month for it to come back in stock and could not wait to use it after it arrived. I filled it half way up with ice and added cold water this morning at 6: 30 a.m. and by noon the ice was melted. Water was cool but not cold. I am kind of disappointed in what I paid for the cup verses a $15 40oz. cup from Walmart that holds ice over 24 hours. I have an 18 oz. Swig that I use for my coffee and it will keep it warm all day. Not sure if I got a faulty cup or what is going on. The details on this cup says *Keeps drinks cold 24+ hours and hot 9+ hours. I am not sure what the Swig's definition of cold is. I highly doubt in 24 hours that the water will even be cool in this cup if it's like this after 6hours. I am not impressed. Pretty cup though.

Hi Kristeen,

Thank you for taking the time to fill this out for us! I am sorry to hear that you may have an issue with your Swig and would be happy to help however we can. If you have not done so already would you please fill out a warranty claim for us? I have added a link to this for you below.

We look forward to hearing from you soon!

The Swig Life Team

K.C. (Norman, US)
Smiley Mega Cup for the win!

Love this mega cup! It keeps my drinks cold and I love the straw. I loved this one so much that I ordered another mega cup! The handle makes it super easy to use and I definitely recommend.

C.B. (Charlotte, US)
Omg the cutest

Perfect amount of fun

D.H. (Amarillo, US)

The company sent me a replacement after my initial purchase wouldn't hold ice. The new one is fantastic! I have zero complaints!

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