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Prep Rally Initial B Mega Mug (40oz)




Prep Rally Initial B Mega Mug (40oz)

Mega sips, mega chills! 🧊 Combinations of vibrant colors come together to create a style fit for anyone's everyday cup.

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


  • Holds up to 40oz
  • Keeps drinks cold 24+ hours and hot 9+ hours
  • 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 (extra straws sold separately)

NOTE: 40oz Mega Mug Reusable Straw Sets are available in a variety of colors! While Printed Reusable Straw Sets will fit the 40oz Mega Mugs, they only extend about an inch outside of the lid.

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


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

Total Straw Length, including silicone flexi-tip: 12"

Clear Plastic Straw Length: 8.75"

Base: 2.8” in diameter

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 1318 reviews

One of my fave designs!


Best Mega Mug!


Absolutely gorgeous! Keeps my drink ice cold for over a day.


I love my Swig Life mega mug !! I drink a lot of water and this cup keeps my water cold and my ice from melting! I would recommend this line . We have Yetis and this works as well if not better !!

Forget Stanley!!!

OBSESSED with my Swig mega mug in Hayride!! I have used it religiously everyday since I got it and haven’t touched my Stanley since. It has definitely helped with my water intake since I’m 4 months postpartum and breastfeeding. Forever a Swig girl now and can’t wait to get other hayride items since I’m also obsessed with cow print!!

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Swig Accessory Fit Guide