Gym-goers carrying a small snack drink
If bag space is limited or you want to finish the drink in one go, compare the carton or bottle size before treating different packs as equivalent snacks.
Who is this for?
Shoppers comparing sugar labels
If added sugar matters to your choice, read the ingredients alongside total sugars per 100ml and per portion. Milk drinks can contain naturally occurring sugars even when labelled no added sugar.
Shoppers checking allergens and ingredients
Read the current pack rather than relying on the flavour name. The Yazoo, Mars and Müller Frijj drinks discussed here contain milk; the named Mars drink also contains barley and sweeteners.
What should you compare?
Start with the amount you expect to drink, compare nutrition on the same basis, then check whether the pack can be carried and stored as planned.
| Priority | What to check | Your needs |
|---|---|---|
| Portion and bag space | Compare pack volume and servings per bottle. The named Yazoo carton is 200ml; the Müller Frijj bottle is 330ml and the Mars bottle is 400ml. | I want a drink I can fit in my bag and finish without carrying an opened pack home. |
| Sugars and ingredients | Read total sugars per 100ml and for the amount you will drink. Check a no-added-sugar claim against the ingredients, including any sweeteners. The NHS distinguishes naturally occurring milk sugars from free sugars. | A no-added-sugar label interests me, but I still want to know how much total sugar is in my portion and whether it contains sweeteners. |
| Protein per drink | Check grams per stated serving and how many servings are in the pack. For example, Tesco lists two 200ml servings in the named 400ml Mars bottle. | If protein affects my choice, the amount in the drink I will actually finish matters more than a front-of-pack claim alone. |
| Storage | Check whether the unopened drink is UHT or requires chilling. Follow its separate instructions for refrigeration and use after opening. | I may carry the drink for several hours, so I need a storage plan that fits the exact pack I buy. |
| Allergens | Read the current allergen and ingredient statements. The named Yazoo, Mars and Müller Frijj drinks contain milk; Tesco also lists barley in the named Mars drink. | Ingredients could rule out a familiar-looking flavour, so I check the pack each time. |
Mistakes to avoid
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Reading “no added sugar” as “sugar-free”
Total sugars include sugars naturally present in milk. The named Yazoo and Mars no-added-sugar drinks still declare total sugars on their nutrition labels.
Check the ingredients and compare total sugars per 100ml and for the portion you plan to drink.
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Leaving a drink that needs chilling in a gym bag all day
UHT describes an unopened product; it does not replace the pack’s instructions after opening. A product sold chilled may have different unopened storage requirements.
Check the exact label before packing it. Keep drinks that require chilling suitably chilled, and refrigerate opened packs as directed.
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Comparing protein claims without checking pack size
One bottle may contain more than one stated serving. Tesco lists two 200ml servings in the named 400ml Mars drink, whereas the named Yazoo carton is 200ml.
Compare protein per 100ml, then check the amount in what you expect to drink.
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Choosing by flavour without reading the ingredients
The named drinks contain milk, while the Mars variant also contains barley and sweeteners. The named Müller Frijj variant lists sugar syrup and fructose.
Read the current ingredient and allergen statements, particularly when avoiding a specific ingredient.
Brands and named milk drinks
These distinctions concern the specific drinks described, not every product made by each brand.
Yazoo
The Chocolate No Added Sugar UHT carton is a 200ml option for someone seeking a smaller, single-serve drink.
- Ocado’s product information lists 6.6g protein and 9.4g total sugars per carton and says it contains no artificial sweeteners.
- It contains milk and naturally occurring sugars. The product says it is best served chilled and must be refrigerated after opening.
Müller Frijj
The Fudge Brownie 330ml UHT milkshake is a larger, thicker option when that style of drink matters more than avoiding added sugar.
- Sainsbury’s lists the named variant as a UHT long-life drink.
- Its listed ingredients include sugar syrup and fructose, and its label reports 10.9g total sugars per 100ml. It requires refrigeration after opening.
Mars
The Chocolate Flavoured Milk Drink No Added Sugar is a 400ml UHT bottle for someone who wants a larger portion.
- Tesco’s product information lists two 200ml servings per bottle, with 7g protein and 13g total sugars per serving.
- The named drink contains milk, barley and the sweeteners acesulfame K and sucralose; it needs refrigeration after opening.
Joybuy shake options
These ready-to-drink protein shakes offer 250ml, 330ml and 500ml portions for a gym-bag drink snack. Compare their pack sizes and labels with the flavoured milk drinks discussed above; they are not the same products.
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REP 5 Ingredients Vanilla Protein Shake, 8 × 250ml
The 250ml can is a smaller ready-to-drink portion for a gym bag. The listing reports 20.3g protein and 10.8g sugars per can, with no added sugar or artificial sweeteners. It contains milk, is described as best enjoyed chilled and must be refrigerated after opening.
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Applied Nutrition Protein Nutrition Shake Strawberries & Cream, 8 × 330ml
This ready-to-drink 330ml bottle suits someone who wants a larger portion without mixing a drink. The listing reports 20g protein and 11.6g sugars per bottle and claims no added sugar. It contains milk; the listing instructs refrigeration after opening and consumption within 12 hours. Check the current pack’s unopened storage instructions before carrying it without chilling.
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Applied Nutrition Protein Nutrition Shake Vanilla Ice Cream, 8 × 500ml
The ready-to-drink 500ml bottle is a larger portion, so consider both appetite and bag space. The listing reports 42g protein and 17g sugars per bottle and claims no added sugar. It contains milk; the listing instructs refrigeration after opening and consumption within 24 hours.
Common questions
Can I leave a milkshake in my gym bag all day?
Check the exact pack before doing so: a drink that requires chilling needs a suitable way to keep it chilled. UHT describes the unopened drink, while the named UHT products instruct refrigeration after opening. An insulated bag and ice pack can help when you need to carry a chilled drink.
Does “no added sugar” mean there is no sugar in the drink?
No. Milk can contain naturally occurring sugars, which remain in the total-sugars figure. Ocado lists 9.4g total sugars in the named 200ml Yazoo carton, and Tesco lists 13g per 200ml serving in the named Mars drink. Read the ingredients and nutrition table together.
Is every flavoured milkshake a post-workout protein shake?
No. Check the protein amount for the portion you will drink rather than assuming the drinks serve the same purpose. Ocado lists 6.6g in the named 200ml Yazoo carton; Tesco lists 7g per 200ml serving in the named Mars bottle; and Sainsbury’s lists 3.4g per 100ml in the named Müller Frijj variant.
Which allergens should I check?
Read the current pack’s allergen and ingredient statements. The named Yazoo, Mars and Müller Frijj drinks contain milk, and the named Mars drink also contains barley. Do not rely on a flavour name or an older online listing when avoiding an allergen.