Grade 3 worksheet for estimating container volumes in liters, with images and capacity options.

To estimate the volume of each container, we need to think about how much liquid each one can hold. The options are: "Less than 1 L", "About 1 L", or "More than 1 L". Let’s go through each item step by step.

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1. A wine glass
Wine glasses are small — they usually hold around 150–300 mL (which is less than 1 liter).
→ Answer: Less than 1 L

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2. A teapot
Teapots vary, but a standard one for serving tea holds about 1 liter. Some might be slightly more or less, but “about 1 L” is a good estimate.
→ Answer: About 1 L

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3. A backpack
Backpacks aren’t containers for liquids, but if you imagine filling it with water (like in a math problem), it could hold many liters — definitely more than 1 L.
→ Answer: More than 1 L

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4. A milk carton
Standard milk cartons sold in stores are often 1 liter (especially in metric countries). Sometimes they’re half-liter or 2L, but “about 1 L” fits best as a general estimate.
→ Answer: About 1 L

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5. A mug
Mugs typically hold between 250–500 mL — that’s less than 1 liter. Even big mugs rarely reach 1 L unless they’re oversized.
→ Answer: Less than 1 L

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6. A pitcher
Pitchers used for serving drinks at home usually hold 1–2 liters. Since the drawing shows a medium-sized pitcher, “about 1 L” is reasonable. But some pitchers are bigger — however, since “about 1 L” is an option and matches common size, we’ll pick that.
→ Answer: About 1 L

*(Note: If this were a large party pitcher, it might be “more than 1 L”, but based on typical classroom examples, “about 1 L” is safe.)*

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7. Juice box
Juice boxes are tiny — usually 200–250 mL. Definitely less than 1 L.
→ Answer: Less than 1 L

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8. Fridge
A fridge is huge! It doesn’t just hold 1 liter — it holds hundreds of liters of food and drink. So even though it’s not a “container” like the others, in context, it clearly holds way more than 1 L.
→ Answer: More than 1 L

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9. Four glasses of juice
One glass of juice is maybe 250 mL. Four glasses = 4 × 250 = 1000 mL = 1 liter. So together, they equal about 1 L.
→ Answer: About 1 L

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Let’s double-check our answers:

- Wine glass → Less than 1 L ✔
- Teapot → About 1 L ✔
- Backpack → More than 1 L ✔
- Milk carton → About 1 L ✔
- Mug → Less than 1 L ✔
- Pitcher → About 1 L ✔
- Juice box → Less than 1 L ✔
- Fridge → More than 1 L ✔
- Four glasses of juice → About 1 L ✔

All make sense!

Final Answer:
A wine glass: Less than 1 L
A teapot: About 1 L
A backpack: More than 1 L
A milk carton: About 1 L
A mug: Less than 1 L
A pitcher: About 1 L
Juice box: Less than 1 L
Fridge: More than 1 L
Four glasses of juice: About 1 L