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Weck 16 oz Jars: Finding the Right Size for Canning and Storage

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Weck is a German glassware brand known for its canning jars with glass lids, rubber rings and small stainless steel clips. Instead of a metal screw lid, a Weck jar seals with a rubber ring pressed between the glass lid and the jar. The clips hold everything together while the jar cools, and once a vacuum forms, the ring’s tab points downward to show the seal is holding. Many people also buy them simply because they look beautiful on a pantry shelf or wrapped as a gift.

The tricky part is sizing. Weck names jars by model number (742, 743, 745, 746) and sizes them in liters, so anyone searching for a 16 oz Weck jar has to do a little conversion. The six listings here range from 12.5 ounces to 1 liter, and differ mainly in capacity, shape (tulip or straight-sided mold) and what comes in the box.

Weck Glass Jars Compared

Jar Capacity (per listing) Approx. ounces Shape Jars in set
Weck 746 0.36 Liter Tulip Jar 0.36 liter 12.5 fl oz Tulip 6
WECK Canning Jars 742 Mold Jars 500 ml (1/2 liter) About 16.9 fl oz Mold 2
WECK 743 Mold Jar 0.75 liter About 25.4 fl oz Mold 2
Weck Tulip Jars 1 Liter with Glass Lids 1 liter About 33.8 fl oz Tulip 2
Weck Tulip Jars 1 Liter with Keep Fresh Covers 1 liter 35.9 fl oz listed Tulip 2
Weck 745 Tulip Jars Not listed Not listed Tulip Not listed

Weck 746 0.36 Liter Tulip Jar for Jams and Small Gifts


Weck 746 0.36 Liter Tulip Jar, 12.5 Oz - Set of 6

Buyers agree 4.6★ average on Amazon

Weck Jars

Weck 746 0.36 Liter Tulip Jar, 12.5 Oz – Set of 6

4.6average rating from Amazon buyers, out of 5

See it on Amazon

Price and specifications are read from the Amazon product page and can change.

Weck 746 0.36 Liter Tulip Jar

Best for: Jam gifts and small-batch canning

Pros

  • Set of six jars
  • Water bath and pressure canning
  • Freezer and oven use listed
  • Made in Germany

Cons

  • 5 oz, under 16 oz

The Weck 746 0.36 Liter Tulip Jar set gives you six jars at 12.5 fluid ounces each. A tulip jar is narrower in the middle and flares out at the top, a shape that is easy to fill and easy to spoon from. This Weck 746 tulip jar is the only listing here that names both water bath and pressure canning, and it says the glass can be frozen and baked.

The listing highlights thick glass made to handle boiling, sterilizing and processing again and again. It is made in Germany and described as BPA-free, lead-free, PVC-free and phthalate-free. Glass lids cannot rust, and the replaceable rubber ring has a tab: when it faces downward, the seal is intact. It has a wide mouth for filling and works for wet and dry storage.

At 12.5 ounces it is a bit under 16 oz, but it is ideal for jam, chutney, honey or homemade gifts where you want several smaller jars. If you truly need about 16 oz in one jar, the 742 below is closer. For even smaller options, our guide to small Weck jars covers the tiny sizes.

WECK Canning Jars 742 Mold Jars for the Closest Match to 16 oz


WECK Canning Jars 742 Mold Jars made of Transparent Glass - Eco-Friendly Canning Jar - Storage for Food, Yogurt with Air Tight Seal and Lid - 1/2 Liter Tall Jar Set - (2 Jars)

WECK

WECK Canning Jars 742 Mold Jars made of Transparent Glass – Eco-Friendly Canning Jar – Storage for Food, Yogurt with Air Tight Seal and Lid – 1/2 Liter Tall Jar Set – (2 Jars)

4.2average rating from Amazon buyers, out of 5

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Price and specifications are read from the Amazon product page and can change.

WECK Canning Jars 742 Mold Jars

Best for: Shoppers wanting the closest to 16 oz

Pros

  • 500 ml, about 16.9 oz
  • Dishwasher and microwave safe
  • Wide mouth mold shape

Cons

  • Listing description conflicts on size
  • Only two jars

If you came here for a 16 oz Weck jar, start with the WECK Canning Jars 742 Mold Jars. The title and features list a set of 2 jars at 1/2 liter each, and the capacity field says 500 ml. That converts to about 16.9 fluid ounces, the nearest size in this group. A mold jar has straight sides and a wide mouth, which makes it great for yogurt, puddings and layered foods you want to scoop out neatly.

The listing calls the glass thick, sturdy and heat resistant, and says it is microwave and dishwasher safe. Lid, gasket and jar are separate pieces, which makes washing easier, and the clamp clip plus rubber gasket create an airtight seal. Suggested uses include juices, pickled vegetables, canned fruits, jams, jellies, dried pulses and spices.

One important warning: the product description below the features contradicts the title. It calls the Weck 742 a 1-liter tulip jar and lists 4 stainless steel clamps. The title, features and capacity all say 1/2 liter mold jars, so we trust those, but double-check the listing before ordering. This jar suits anyone who needs a single-serve 16 oz container for overnight oats, yogurt or small batches of pickles.

WECK 743 Mold Jar for Larger Portions and Fermenting


WECK 743 Mold Jar (Weck 743)

WECK

WECK 743 Mold Jar (Weck 743)

4.4average rating from Amazon buyers, out of 5

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Price and specifications are read from the Amazon product page and can change.

WECK 743 Mold Jar

Best for: Yogurt, pickles and bigger portions

Pros

  • 75 liter capacity
  • Freezer, microwave, dishwasher safe
  • Clips, glass lid, rubber ring

Cons

  • Lid type described inconsistently
  • Only two jars

The WECK 743 Mold Jar steps up to 0.75 liter, about 25.4 fluid ounces, and comes as a set of 2. Like the 742, the Weck 743 mold jar has straight sides and a wide mouth, measuring about 5 by 5 by 7 inches.

The listing names dishwasher, microwave and freezer safety, and uses including yogurt, juices, pickled vegetables, fruits, jams, jellies, pulses and spices. There is an inconsistency in the lid description: the features mention silicone lids, while the included components list clips, a glass lid and rubber. The listing does not settle which it is, so check the photos if the lid type matters to you.

This size suits families making a quart-ish batch of yogurt, fermenting vegetables or storing larger amounts of dried goods. It is too big if you want 16 oz portions; the 742 is the better fit there.

Weck Tulip Jars 1 Liter with Glass Lids for Sourdough Starter

Best for: Fridge storage with quick-open covers

Pros

  • Adds keep fresh covers
  • Dishwasher and microwave safe
  • Two 1 liter jars

Cons

  • Listed volume differs from 1 liter

Weck Tulip Jars 1 Liter - Large Sour Dough Starter Jars with Wide Mouth - Suitable for Canning and Storage - 2 with Glass Lids

Buyers agree 4.9★ average on Amazon

WECK

Weck Tulip Jars 1 Liter – Large Sour Dough Starter Jars with Wide Mouth – Suitable for Canning and Storage – 2 with Glass Lids

4.9average rating from Amazon buyers, out of 5

See it on Amazon

Price and specifications are read from the Amazon product page and can change.

Weck Tulip Jars 1 Liter

Best for: Sourdough starter bakers

Pros

  • 1 liter tulip shape
  • Glass lids, gaskets and clips
  • Wide mouth for stirring

Cons

  • Size details conflict in listing

The Weck Tulip Jars 1 Liter set with glass lids is marketed to sourdough bakers. The title describes 2 jars with glass lids and a wide mouth, suitable for canning and storage, and the description mentions rubber gaskets and small stainless steel clips. A 1 liter jar holds about 33.8 fluid ounces, roughly double a 16 oz jar, which gives a sourdough starter room to rise.

The listing mentions BPA-free glass, microwave safety and dishwasher-friendly cleaning, with suggested uses including juice, cereal, pulses and vegetables. Some details do not add up: the dimensions are about 3.87 by 3.87 by 5.75 inches and the description refers to it as a Weck 745 jar, while the title says 1 liter, and the package quantity field says 1 while the title says 2. We cannot confirm from the listing which is correct.

This set suits bakers who want a pretty, wide-mouth home for a starter, or anyone looking for a Weck 1 liter tulip jar for juice or dry goods. Because of the conflicting details, confirm the size with the seller if an exact capacity matters.

Weck Tulip Jars 1 Liter with Keep Fresh Covers for Everyday Fridge Storage

The second Weck Tulip Jars 1 Liter listing is nearly identical to the one above, with one useful extra: keep fresh covers. These are simple push-on covers for day-to-day storage, so you do not need the glass lid, ring and clips every time you open the jar. The title says 2 jars with glass lids and keep fresh covers; the description adds rubber gaskets and stainless steel clips.

The listing names dishwasher and microwave safety, and suggested uses cover canning, dried pulses, juice, leftover food, pickled vegetables and sourdough starter. Size information is again uneven: the capacity is 1 liter, but the item volume is 35.9 fluid ounces (1 liter is about 33.8), and the dimensions match the smaller set above. Treat it as roughly a liter.

This version suits people who open their jars daily, such as sourdough bakers feeding a starter or families storing juice. If you only plan to can and seal, the glass-lid set is enough. For larger mason-style storage, see our wide mouth 24 oz jar guide.

Weck 745 Tulip Jars for Replacing a Classic Jar

Best for: Buyers replacing a single 745 jar

Pros

  • Classic 745 tulip shape
  • Glass lid with rubber seal
  • Dishwasher and microwave safe

Cons

  • Capacity not listed
  • Few details in listing

The Weck 745 Tulip Jars listing is short on specifics. It describes the classic tulip shape, slightly narrower at the neck and wide at the opening, and a glass lid with a rubber seal. It lists BPA-free glass, dishwasher washing and microwave safety, with uses for cereal, fruit and vegetables.

The listing does not specify the capacity, the number of jars or whether clips are included; the included components simply say “745 Jar”. That makes it hard to compare with the Weck 745 tulip jar sizes mentioned elsewhere.

This suits someone who already knows the 745 and wants to add to a matching collection. For first-time buyers aiming at 16 oz, the 742 offers clearer sizing.

How to Choose the Right Weck Glass Jars

Convert liters to ounces. One liter is about 33.8 fluid ounces. So 0.36 liter is about 12 oz, 1/2 liter about 16.9 oz, 0.75 liter about 25.4 oz and 1 liter about 33.8 oz. For a 16 oz Weck jar, the 742 is the match.

Pick a shape. Tulip jars (746, 745 and the 1 liter sets) are easy to pour from and look lovely as gifts. Mold jars (742, 743) have straight sides, which make it easier to scoop out yogurt or unmold desserts.

Check what is included. A full seal needs a glass lid, a rubber ring and clips. Several listings are vague, so confirm before you start a canning session. Keep fresh covers are a nice extra for everyday use.

Match the jar to the job. Small jars for jam gifts, 16 oz for single servings, larger jars for fermenting and sourdough. For tiny spice or gift jars, our mini Weck jars roundup is a good next stop.

FAQ

Which Weck jar is closest to 16 oz?

The 742 mold jar, listed at 1/2 liter or 500 ml, which is about 16.9 fluid ounces.

How do Weck jars seal without a metal lid?

A rubber ring sits between the glass lid and the jar, and clips hold them together during processing. As the jar cools, a vacuum forms. The 746 listing explains that a downward-facing tab on the ring shows the seal is intact.

Can Weck jars go in the freezer?

The 746 and 743 listings mention freezer use. Leave space at the top for food to expand, which is standard advice for any glass jar.

Are Weck jars dishwasher safe?

The 742, 743, keep fresh cover set and 745 listings mention dishwasher cleaning. The rubber rings are separate and easy to hand wash.

What is the difference between a tulip jar and a mold jar?

A tulip jar curves in and flares at the top; a mold jar has straight sides. Both use the same glass lid, ring and clip system.

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