Anal Plug FUN FACTORY B BALL UNO with Unique Inside Ball
€11.95
Anal Plug FUN FACTORY B BALL UNO with Unique Inside Ball
- Anal
- Waterproof
Silicone and ABS butt plug with a weighted ball that moves freely inside. It is 7.9 cm long in total and 3.4 cm in diameter, with a 7.3 cm base that stays outside. Available in Green and Black.
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Fun Factory B Ball UnoA ball inside that moves with you.
Inside the plug is a weighted ball that shifts every time you move. The tip tapers so it goes in easily, and the wide base holds it in place from the outside. The manufacturer describes it as water-resistant.
- Inner ball
- Silicone and ABS
- 57 g
- 2 colours
The essentials
Fun Factory B Ball Uno: what you need to know before you buy
Is it for you?
Who the Fun Factory B Ball Uno is for, and who it isn't for
It suits you if…
- You want a butt plug with something that moves inside, not just a fixed shape.
- You want a small butt plug, 7.9 cm long in total and 3.4 cm in diameter.
- You want it for partner sex or spanking, which is how the manufacturer suggests using it.
- You'd like to use it in the shower too: the manufacturer describes it as water-resistant.
Better look elsewhere if…
- You want a longer or wider butt plug. This one is 7.9 cm long in total and 3.4 cm in diameter.
- You prefer a butt plug that stays still. The ball inside shifts with every movement.
- You usually use silicone lubricant. With the silicone of this plug, a water-based one is best.
Size and measurements
Fun Factory B Ball Uno size: shorter than a bank card
It is 7.9 cm (3.1 in) long in total, base included, a little less than a bank card. The plug is 3.4 cm (1.3 in) in diameter, a little wider than a two-euro coin and a little less than a ping-pong ball, and the base is 7.3 cm (2.9 in) across, a little more than a tennis ball. Everything goes in except the base; the manufacturer doesn't say how long the part that goes in is.
Total length and base width, from the manufacturer.
Length, to scale
AA battery 5 cm (2 in)
This product 7.9 cm (3.1 in)
Bank card 8.6 cm (3.4 in)
Width, to scale
Two-euro coin2.6 cm (1 in)
This product3.4 cm (1.3 in)
Ping-pong ball4 cm (1.6 in)
Step by step
How to use the Fun Factory B Ball Uno
- Wash it before use with warm water and mild soap or a toy cleaner.
- Apply water-based lubricant to the plug and to yourself.
- Insert it slowly, tip first, which is the narrow end. Go at your own pace and breathe.
- Go as far as the base. The base always stays outside.
- Move with it in: the inner ball shifts with every movement.
- Take it out slowly, holding it by the base.
Cleaning
Use warm water and mild soap or a toy cleaner, before and after every use. Let it dry completely before storing it.
Our tips
- If it hurts, stop. A butt plug shouldn't hurt.
- Don't move it from the anus to the vagina without washing it first.
- Don't use silicone lubricant: it can damage the surface of the silicone.
- If you use it with a latex condom, no oils.
- If you notice irritation, stop using it.
What the science says
What the science says about lubricant in anal sex
The studies we cite did not test this butt plug. What has been studied is the use of lubricant in anal sex.
They used one of six water-based or silicone lubricants for 5 weeks. In anal sex with a penis, the water-based one was associated with more pleasure and satisfaction than using no lubricant. The study is about anal sex with a penis, not butt plugs.
Specifications
Fun Factory B Ball Uno specifications
- Total length
- 7.9 cm (3.1 in)
- Diameter
- 3.4 cm (1.3 in)
- Base width
- 7.3 cm (2.9 in)
- Weight
- 57 g
- Material
- Silicone and ABS
- Inside
- Weighted ball that moves freely
- Shape
- Tapered tip and wide base
- Water resistance
- Water-resistant (IPX7)
- Lubricant
- Water-based (our recommendation, because of the silicone)
- Colours
- Green and Black
- Brand
- Fun Factory
- Model
- B Ball Uno
Questions
Fun Factory B Ball Uno: frequently asked questions
What is inside the Fun Factory B Ball Uno?
A weighted ball that moves freely inside the butt plug. It shifts with every movement you make.
How big is the Fun Factory B Ball Uno?
7.9 cm (3.1 in) long in total and 3.4 cm (1.3 in) in diameter, with a 7.3 cm (2.9 in) base. Everything goes in except the base.
Does the Fun Factory B Ball Uno stay in place?
Yes. The base is 7.3 cm (2.9 in), more than twice the diameter of the plug, and it stays outside. The manufacturer says it is comfortable and holds well.
Can you use the Fun Factory B Ball Uno in the shower or bath?
In the shower, yes: the manufacturer describes it as water-resistant. For the bath, according to the product information it has IPX7 protection, which withstands immersion.
Which lubricant should you use with the Fun Factory B Ball Uno?
A water-based one. It is made of silicone and ABS, and silicone lubricant can damage the surface of the silicone.
Is the Fun Factory B Ball Uno suitable for beginners?
The manufacturer presents it as a butt plug for people who are starting out. It is small, 3.4 cm (1.3 in) in diameter, and the tip tapers so it goes in easily; even so, go slowly and use lubricant.
How do you clean the Fun Factory B Ball Uno?
Use warm water and mild soap or a toy cleaner, before and after every use. Let it dry completely before storing it.
Before publishing this product sheet we check that every figure is in its sources and that what it says holds up. Product sheets that do not pass this check are not published. How we verify information ›
Product sheet updated on 14 October 2026
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