Onaholes aren't limited to the typical single-opening design - there's also a “dual-opening” type with two separate openings.
That said, products called dual-opening onaholes don't all share the same structure. Some have two fully independent interior structures, while others connect partway through - it varies by product.
This article covers the basic idea behind dual-opening onaholes, how they differ from single-opening types, and what to check when choosing and caring for one.
Table of Contents
What Is a Dual-Opening Onahole?

A dual-opening onahole is a type with two usable openings. Exterior shape, interior shape and depth, firmness, and where the openings sit all vary by product. Since many of these products are quite distinctive, check each one's structure in its product description.
See the article below for more on materials and internal structure in general.
Differences from Single-Opening Types
There Are Two Openings
The most obvious difference is having two openings. Some products vary the internal shape by opening so you can enjoy a different feel from each.
Check each product's page for the interior design.
The Body Tends to Be Larger
Because it houses two openings, some products are wider and heavier than a single-opening type. Checking the size before buying - along with your storage space and how much room you have for washing - gives peace of mind.
There's More to Wash
With two openings, you need to wash and dry the interior of each one. However, if the interior connects in an I-shape or U-shape, water or cleaning agent can travel to the side you didn't use, even if you only used one opening. Check both openings when washing.
What to Check When Choosing a Dual-Opening Type

The Interior Structure of Each Opening
Having two openings doesn't mean the interior is identical throughout. If a product description or cross-section diagram is available, check these points:
- How deep each opening is
- What the interior ridges or shape look like
- Whether the interior connects partway through
- Whether it's a through-hole or non-through design
- Whether the material or firmness differs between openings
Body Size and Weight
Dual-opening types aren't limited to handheld sizes - some have real presence. Check your storage space, how easy it is to carry, and whether you can comfortably handle the weight when washing.
Ease of Washing
The more complex the structure, the more it matters that no moisture is left behind after washing. Products with a narrow opening, a deep interior, or lots of curves can take longer to dry.
Caring for a Dual-Opening Onahole
Keep the following points in mind when maintaining a dual-opening onahole.
Wash the Opening You Used Right Away
After use, rinse away lubricant and grime with lukewarm water as soon as you can. Wash gently to avoid damaging the material - don't pull hard or insert a stiff brush into the interior.
See the article below for the basic care method.
Check the Other Opening Too
On products where the interior connects, moisture or lubricant can migrate to the side you didn't use. Rinse from both openings and confirm no cleaning residue or grime remains.
Dry Each Interior
After washing, drain water with the opening facing down and confirm no moisture remains in either interior. The outside may be dry while the inside is still damp. Store it only once it's completely dry.
Who a Dual-Opening Type Suits
Dual-opening onaholes suit people who want to choose between multiple internal structures in a single product, or who appreciate distinctive sculpting.
On the other hand, if you prioritize ease of washing and drying above all else, a simple single-opening type may be easier to handle.
What matters isn't just the number of openings or products available - it's choosing with the care routine after purchase in mind too.
Check the Interior Differences, Not Just the Openings
Dual-opening onaholes have two usable openings, but the internal structure varies significantly from product to product.
When buying, check the structure of each opening along with size, weight, ease of washing, and ease of drying.
After use, checking both openings and making sure no moisture or cleaning residue remains inside is key to keeping it clean over the long run.