What Size Straw for a 40 oz Tumbler? Check More Than Capacity
By Feng, Head of After-Sales Service & Online Marketing Lead
A 40 oz capacity label does not tell you the right straw length or diameter. Match the straw to the actual tumbler, lid and drinking position—and check the packed product before approving a bulk order.
There is no single straw size for a 40 oz tumbler, because two tumblers with the same capacity can differ in inner height and lid thickness. The straw has to reach a usable position inside the selected cup and leave a comfortable length above the lid, so a catalogue capacity is not a substitute for the assembled sample. At BG Drinkware, a requested straw size is reviewed against the actual liner height, lid thickness and customer requirements, and PP or stainless steel straws can be customized by order. A complete straw specification names the material, length, diameter, exposed length above the lid, and the selected tumbler and lid version. In one customer case, extending the exposed part of the straw by 1 cm led to a larger retail box and higher freight cost, so approve the straw and its packaging together. A 40 oz tumbler holds about 1.18 litres, but liner height and lid thickness, not the 40 oz label, decide the straw length.
Why can two 40 oz tumblers need different straws?
Their internal height and lid arrangement can differ even when the stated capacity is the same. The straw must reach a usable position inside the selected tumbler and leave a comfortable amount above the lid. A catalog capacity is not a substitute for the assembled sample.
At BG Drinkware, the requested straw size is reviewed against the actual liner height, lid thickness and customer requirements. Confirm the body and lid version first, then decide the straw length. A dimension taken from a different cup or a photograph cannot establish the fit.
If you are choosing a model for a bulk order, start with the tumbler’s body and lid configuration. The linked product is a model reference, not a universal replacement-straw specification for all 40 oz cups. To compare 40 oz models, see our 40 oz tumbler buyer guide.
What should be included in the straw specification?
Record the length, material, outside diameter and connection details against one approved tumbler-and-lid combination. “A straw for a 40 oz cup” leaves too much room for a different part to be supplied.
- Selected model: identify the tumbler body and the exact lid version.
- Length: confirm the total length and the portion exposed above the assembled lid.
- Material: specify PP or stainless steel as agreed for the order.
- Fit: confirm the straw outside diameter against the lid hole or connection.
- Use and packing: check drinking, closure, retention and the final box with the selected straw.
Keep these details with the approved sample and order specification. Changing the material or lid connection is not just a color change: ask the factory to review the replacement part against that same assembled model.
Confirm the interface, not just the opening
Use the selected lid and straw together to confirm outside diameter, connection and reach. Do not transfer dimensions from a visually similar opening. The white lid shown here is a different design reference, not the approved straw assembly for your order.
Can a straw be shortened after it arrives?
BG Drinkware confirms that a PP plastic straw can be cut shorter. For a bulk order, however, the better starting point is an agreed length before production and packing. Cutting later does not solve a straw that is already too short or has the wrong outside diameter.
After changing a PP straw length, recheck it in the selected cup and lid: can the user drink conveniently, does the lid close as intended, and does the straw stay in place? Do not assume that making it shorter resolves a connection problem.
This cutting option should not be carried over to stainless-steel straws. Agree any stainless-steel size adjustment with the factory instead of treating it as a customer trimming step. Order-specific customization should include the accessory dimensions, not only the cup’s color or logo.
What happened when a customer requested 1 cm more length?
A customer wanted the portion above the lid extended by 1 cm because the original size did not meet their preference. BG Drinkware adjusted the straw, and the customer was very satisfied with the revised version.
The change also had a packaging consequence: the retail box became larger and freight costs increased. The customer accepted that trade-off because they considered the improved product experience more important.
This is a factory experience supplied by BG Drinkware, not a recommendation to add 1 cm to every tumbler straw. For another order, request revised box dimensions and a freight quotation before approving the longer straw. The relevant lesson is to approve the drinking position and the packed configuration at the same time.
For a similar adjustment, ask whether the revised straw changes the intended packing arrangement. Confirm the individual box and carton plan before finalizing the quotation. A small accessory change should not become a freight surprise after the order has been packed.
What should buyers check before bulk approval?
Check the assembled product, not the loose straw alone. BG Drinkware reviews drinking, closing and looseness alongside the dimensions. Agree the order-specific requirements before bulk production.
Use the approved body, lid and straw together. Confirm that the exposed length feels right for the intended use, drinking works as expected, the lid closes correctly and the connection does not loosen during the agreed checks. Then review the product in its planned packaging.
If a dimension changes after sample approval, identify which items need another review: the straw, the mating lid or the box. The quality-control discussion should refer to the actual order configuration; an earlier sample does not establish acceptance of a later size change.
Planning a branded run?
If you sell 40 oz tumblers, put the straw length, diameter and material on the order so replacement straws fit the lid. See wholesale tumblers for models with straw lids. The standard minimum order is 500 pieces, negotiable.
40 oz tumbler straw FAQ: length, diameter and fit
What size straw do I need for my 40 oz tumbler?
Use the dimensions for your specific tumbler and lid. Capacity alone does not determine straw length or diameter. Confirm the internal height, lid thickness, exposed length and connection with the supplier.
Will a replacement straw fit every cup with the same capacity?
Do not assume so. The body height, lid hole and connection can be different. Confirm the straw outside diameter and length against the exact model before placing a replacement or bulk order.
Can BG Drinkware supply a custom straw length?
Yes. PP and stainless-steel straws can be customized according to the order. Supply the selected cup and lid information, requested length and quantity, then approve the assembled sample.
Can a longer straw affect shipping costs?
Yes, if the revised packing requires a larger box. In the customer case described above, adding 1 cm to the exposed portion led to a larger retail box and increased freight costs. The effect for another order must be checked against its own packaging.
Confirm the 40 oz tumbler straw and its box together
Send the selected tumbler and lid, requested straw material and dimensions, order quantity and packaging requirements. BG Drinkware can discuss the fit and the packing implications before you approve the order.
