The big tumbler is having a long moment. It is on desks, in gyms, in car cup holders and in a great many Christmas lists. The obvious question when you go to buy one is whether to get the 40oz or the 20oz, and the obvious answer — bigger is better — is wrong about half the time.
They are not the same object at different scales. Changing the size changes where it fits, how it is carried and how often it gets washed. Here is the honest comparison.
The two, side by side
The 40oz with handle holds roughly 1.2 litres, stands about 28 cm tall, and has a moulded handle, a slide lid and a straw. It is stainless steel with a glossy white coated finish.
The 20oz skinny holds roughly 590 ml in the slim tapered profile designed to drop into a standard car cup holder. Also insulated stainless steel, supplied with a straw and a cleaning brush.
Both are hand wash only, neither is microwave safe, and on both the design is printed into the coated surface rather than sitting on top of it, so it will not peel at the edges or crack the way an applied wrap does.
Where the 40oz stops fitting
This is the part that catches people out, so it is worth being blunt about it.
At 28 cm tall, the 40oz will not fit under a lot of fridge water dispensers. Measure the gap on your fridge before you buy — it takes ten seconds and it is the single most common regret with a tumbler this size.
It also will not go in a small handbag, and it is a squeeze in some car cup holders even where the base fits, because the handle needs clearance. Full, it weighs well over a kilo. That is fine on a desk and fine in a car, and it is a lot to carry around a shopping centre.
None of that makes it a bad cup. It makes it a cup that lives somewhere — a desk, a kitchen counter, a car — rather than one that travels with you.
Where the 20oz wins
The 20oz is the one that goes places. It fits cup holders, it fits most bags, and it is light enough to carry in one hand with a phone in the other.
The trade is obvious: you refill it more. If your goal is to drink two litres of water a day without thinking about it, the 40oz gets you there in two fills and the 20oz in three or four. If your goal is to have a nice cold drink with you wherever you happen to be, the 20oz wins easily.
It is also £7 cheaper, which matters if you are buying several as gifts.
Washing up: the thing nobody mentions
Neither is dishwasher safe. That is normal for insulated steel — dishwasher heat and detergent are hard on both the vacuum seal and any printed finish — but it means both need washing by hand, and the bigger one needs a longer brush and a bigger draining space.
The routine that keeps either of them from going stale is the same: rinse it out the day you use it, wash the straw with the brush after anything sweet or milky, and leave everything to dry with the lid off. A sealed lid on a damp tumbler is where the smell begins.
If you are honest with yourself that a 1.2-litre cup will sit in the sink for three days, the smaller one is the better purchase.
Which to buy as a gift
A few patterns from what people actually order.
The 40oz suits someone with a desk, a car and a habit — the person already carrying a big cup around who would appreciate a nicer one with their name on it. It is a substantial gift and it looks it.
The 20oz suits almost everyone else, and it is the safer choice when you are not sure. It is the one to buy for a teacher, a colleague, a Secret Santa with a budget, or a set of bridesmaids.
Neither, if the drink is hot. Both keep coffee warm perfectly well, but if what someone actually wants is an iced coffee glass to look at as much as drink from, the square borosilicate iced coffee glass is a different sort of object — 13 oz, glass, lid and reusable straw, and strictly for cold drinks.
What to have printed
Both take a name, initials, a short line about the person, a team or club name, or a small business logo. You pick from six font styles, and which one you pick matters more than people expect:
- Script and Hand suit first names and warm, informal wording.
- Block and Mono suit initials, sports, clubs and business use.
- Serif and Display suit anything that should read a little more formally.
A single first name is the most popular choice by a distance, and on the 40oz there is enough room for a full wrap design if you want one — upload your artwork as a PNG, JPEG or SVG and say so in the notes.
One warning worth repeating: because both are printed with your wording, they cannot be returned for a change of mind or a typo. Check the spelling twice before you add to basket. It is the one mistake we cannot undo afterwards.
The short version
- Measure your fridge dispenser gap before buying the 40oz. 28 cm is taller than it sounds.
- Buy the 20oz if it needs to travel, fit a bag, or be one of several gifts.
- Buy the 40oz if it will live on a desk or in a car and you are tired of refilling.
- Both are hand wash only. Dry with the lid off.
- Check the spelling.
Both are made to order in Cheshire and usually dispatched within one to three working days, with free UK delivery and no minimum spend.
