Are 40oz Tumblers Worth It? An Honest Answer

Yes — a 40oz tumbler is worth it if you spend most of your day at a desk, in a car, or at the gym, because one 1.2-litre fill covers most of your daily water intake without refilling. It's less worth it if you commute on crowded transport or carry a small bag, where the size and 1.3kg+ weight become a burden.

That's the honest version. Here's the detail.

What you get for the money

A quality 40oz tumbler holds around 1.2 litres — roughly a full day's fluid in one fill (the NHS suggests 6–8 glasses, about 1.2–1.5 litres). A good one keeps drinks cold up to 24 hours and hot up to 8 with double-wall vacuum insulation, and replaces single-use cups for years. At around £20, it pays for itself quickly.

When it's worth it

  • You work at a desk and hate getting up to refill.
  • You drive a lot or work long shifts.
  • You're trying to drink more water and want a visible target.
  • You train and want cold electrolytes on hand all session.

When it isn't

  • You commute standing on a packed train.
  • You carry a small handbag it won't fit in.
  • You mainly drink hot coffee you finish quickly — a 500ml coffee cup suits you better.

The verdict

For most people who are stationary during the day, a 40oz tumbler genuinely changes a habit. The Mato London 40oz Insulated Tumbler comes in five colours at £19.99 with free UK delivery, and pairs cheaper as the Hydration Duo two-pack.

Shop 40oz tumblers →

Related reading

Frequently asked questions

Are 40oz tumblers worth the money?

Yes, for desk work, driving and the gym — one 1.2-litre fill covers most of a day's water and it replaces single-use cups for years, paying for itself quickly.

Is a 40oz tumbler too big for everyday use?

For stationary days, no. For crowded commutes or small bags, a 30oz or 500ml cup is more practical, because a full 40oz weighs over 1.3kg.

How much water does a 40oz tumbler hold?

About 1.2 litres — roughly a full day's recommended fluid intake in one fill.

Back to blog