Uploaded July 2025 | Updated September 2026, 2 weeks ago
John from DiscountJuicers.com reveals what most Amazon sellers won’t tell you about mason jar vacuum sealers — from misleading vacuum specs to cheap lids that fail under pressure. In this episode, he exposes the truth behind popular electric vacuum pumps and demonstrates why proper oxygen removal is critical for preserving the flavor, freshness, and shelf life of your foods.
In this hands-on review, John uses a professional vacuum gauge to test 11 best-selling mason jar sealers from Amazon — many claiming to reach high vacuum levels like 85 kPa, yet most barely remove 60% of oxygen. He breaks down why that shortfall leads to faster spoilage, nutrient loss, and the growth of mold in stored foods.
To visually show the difference, John runs a side-by-side marshmallow vacuum test, comparing standard Amazon pumps to the Pure MVP Manual Pump, which removes up to 85% oxygen thanks to its precision-engineered, aircraft-grade aluminum build and check valve system.
In this episode, you’ll learn:
Why oxygen removal matters for juice, smoothies, coffee, dried fruits, and more
How most cheap lids bend, leak, and can’t be reused reliably
Why Pure Valve Lids with silicone gaskets offer a reusable, airtight solution
How to improve vacuum sealing on blender carafes like the DynaPro
How the Pure MVP Pump beats all electric competitors with higher performance and durability
Whether you're a home juicing pro, meal prepper, raw food enthusiast, or food storage nerd — the Pure MVP system is the smart investment for reliable, long-term storage.
✅ Order the winner of this test at bit.ly/puremvp
🎟 Use coupon code DJ5 at checkout to save $5 on kits over $100 and enjoy free shipping.
If you’re tired of cheap pumps that fail and want a system that actually works — this is the vacuum solution you’ve been looking for.
Jump to the following parts of this episode:
00:00 Episode Begins
00:20 How to Store Juices & Dry Goods for Maximum Freshness
01:00 What Amazon Sellers Won’t Tell You About Vacuum Sealers
01:33 Why Removing Most Oxygen Matters for Shelf Life & Nutrition
02:35 Cheap Amazon Lids: Thin, Bend Easily & Don’t Seal Repeatedly
04:40 Introducing Pure Stainless Steel Valve Lids (Reusable & Easy Off)
05:16 The Vacuum Tester I Use for Real Accuracy
06:01 Testing: ShunChengFa 3-in-1 Electric Food Saver
06:55 Testing: Konatly Electric Mason Jar Vacuum Sealer
07:45 Testing: ZenTong Vacuum Sealer – Does It Work?
09:09 Testing: Arctiiro Electric Sealer – Weak Seal Warning
10:30 Testing: BTD-DARBY – Solid Numbers or Just Hype?
11:10 Testing: KIMTOUL Sealer Kit – Looks Good, But Performance?
12:19 Testing: ThermoMaven Patented Sealer – Real Potential?
12:45 Testing: HIMAAT – Compact, But Underwhelming
13:23 Testing: HoliPapaya CL0811 – Best Electric So Far
13:48 Summary: Most Electric Pumps Remove Only ~60% Oxygen
14:50 Manual Test: Unomor Jar Sealer – Higher Vacuum Than Electric
17:00 Testing: Pure MVP Aircraft Aluminum Pump – Top Performer
18:10 Why Disposable Amazon Pumps Fail Long-Term
20:15 Removing More Oxygen = Better Preservation. Here’s Proof
24:10 Final Verdict: Best Vacuum Pumps Tested & Ranked
25:20 Save $5 + Free Shipping – Use code DJ5 at bit.ly/puremvp on $100+
Referenced & Related Videos:
Preserve Food 7x Longer by removing 85% oxygen
youtube.com/watch?v=zWxkxG1_MfQ
Pure MVP Vaccuum Pump Kit Unboxing Review
youtube.com/watch?v=-cyzLjbOIZE
Prototype Pure MVP Pump / Indigogo Episode
youtube.com/watch?v=yVrwOcSunZI
How to Store Juice 1 Week (all my tips)
youtube.com/watch?v=kQI2x5x-DLw
Subscribe to DiscountJuicers for more videos like this:
youtube.com/subscription_center?add_user=rawfoods
Ask John your juicer questions at:
discountjuicers.com/help.html
Watch John's latest videos on Juicers, Blenders, Dehydrators, and More at
youtube.com/user/rawfoods/videos
Referenced Products
Buy Pure MVP Pump Kit at
bit.ly/puremvp use coupon DJ5 & Get Free Shipping on Kits $100+
Buy other Vacuum Pumps / Lids in this episode at
amazon.com/shop/JohnKohler
When you use the above links, the above companies will share a small commission with John so he can continue his work.
John from DiscountJuicers.com reveals what most Amazon sellers won’t tell you about mason jar vacuum sealers — from misleading vacuum specs to cheap lids that fail under pressure. In this episode, he exposes the truth behind popular electric vacuum pumps and demonstrates why proper oxygen removal is critical for preserving the flavor, freshness, and shelf life of your foods.
In this hands-on review, John uses a professional vacuum gauge to test 11 best-selling mason jar sealers from Amazon — many claiming to reach high vacuum levels like 85 kPa, yet most barely remove 60% of oxygen. He breaks down why that shortfall leads to faster spoilage, nutrient loss, and the growth of mold in stored foods.
To visually show the difference, John runs a side-by-side marshmallow vacuum test, comparing standard Amazon pumps to the Pure MVP Manual Pump, which removes up to 85% oxygen thanks to its precision-engineered, aircraft-grade aluminum build and check valve system.
In this episode, you’ll learn:
Why oxygen removal matters for juice, smoothies, coffee, dried fruits, and more
How most cheap lids bend, leak, and can’t be reused reliably
Why Pure Valve Lids with silicone gaskets offer a reusable, airtight solution
How to improve vacuum sealing on blender carafes like the DynaPro
How the Pure MVP Pump beats all electric competitors with higher performance and durability
Whether you're a home juicing pro, meal prepper, raw food enthusiast, or food storage nerd — the Pure MVP system is the smart investment for reliable, long-term storage.
✅ Order the winner of this test at bit.ly/puremvp
🎟 Use coupon code DJ5 at checkout to save $5 on kits over $100 and enjoy free shipping.
If you’re tired of cheap pumps that fail and want a system that actually works — this is the vacuum solution you’ve been looking for.
Jump to the following parts of this episode:
00:00 Episode Begins
00:20 How to Store Juices & Dry Goods for Maximum Freshness
01:00 What Amazon Sellers Won’t Tell You About Vacuum Sealers
01:33 Why Removing Most Oxygen Matters for Shelf Life & Nutrition
02:35 Cheap Amazon Lids: Thin, Bend Easily & Don’t Seal Repeatedly
04:40 Introducing Pure Stainless Steel Valve Lids (Reusable & Easy Off)
05:16 The Vacuum Tester I Use for Real Accuracy
06:01 Testing: ShunChengFa 3-in-1 Electric Food Saver
06:55 Testing: Konatly Electric Mason Jar Vacuum Sealer
07:45 Testing: ZenTong Vacuum Sealer – Does It Work?
09:09 Testing: Arctiiro Electric Sealer – Weak Seal Warning
10:30 Testing: BTD-DARBY – Solid Numbers or Just Hype?
11:10 Testing: KIMTOUL Sealer Kit – Looks Good, But Performance?
12:19 Testing: ThermoMaven Patented Sealer – Real Potential?
12:45 Testing: HIMAAT – Compact, But Underwhelming
13:23 Testing: HoliPapaya CL0811 – Best Electric So Far
13:48 Summary: Most Electric Pumps Remove Only ~60% Oxygen
14:50 Manual Test: Unomor Jar Sealer – Higher Vacuum Than Electric
17:00 Testing: Pure MVP Aircraft Aluminum Pump – Top Performer
18:10 Why Disposable Amazon Pumps Fail Long-Term
20:15 Removing More Oxygen = Better Preservation. Here’s Proof
24:10 Final Verdict: Best Vacuum Pumps Tested & Ranked
25:20 Save $5 + Free Shipping – Use code DJ5 at bit.ly/puremvp on $100+
Referenced & Related Videos:
Preserve Food 7x Longer by removing 85% oxygen
youtube.com/watch?v=zWxkxG1_MfQ
Pure MVP Vaccuum Pump Kit Unboxing Review
youtube.com/watch?v=-cyzLjbOIZE
Prototype Pure MVP Pump / Indigogo Episode
youtube.com/watch?v=yVrwOcSunZI
How to Store Juice 1 Week (all my tips)
youtube.com/watch?v=kQI2x5x-DLw
Subscribe to DiscountJuicers for more videos like this:
youtube.com/subscription_center?add_user=rawfoods
Ask John your juicer questions at:
discountjuicers.com/help.html
Watch John's latest videos on Juicers, Blenders, Dehydrators, and More at
youtube.com/user/rawfoods/videos
Referenced Products
Buy Pure MVP Pump Kit at
bit.ly/puremvp use coupon DJ5 & Get Free Shipping on Kits $100+
Buy other Vacuum Pumps / Lids in this episode at
amazon.com/shop/JohnKohler
When you use the above links, the above companies will share a small commission with John so he can continue his work.
