What material is the lid?

It's a rubbery feeling plastic (I think polyethylene).

Does this lid fit all Keep Cup sizes? I accidentally melted the twisting bit of mine in the dishwasher.

I have many different Keep Cups and the 8 oz size and 12 0z size lids are interchangable. I am not sure about the thermal, because mine dripped coffee - it did not seal properly - and it would drip on my clothes when traveling so I got rid of the thermal cup.

Is this microwave safe?

This is the stainless steel version and would not be safe for use in a microwave.

How long does this keep your drink warm

I did a short test using my 12oz Thermal, filled the cup with water heated to 163°F/72.8°C, then put on the lid and started waiting. After 10 minutes it had cooled down to 154°F/67.8°C, 20 minutes 149°F/65°C, 30 minutes 146°F/63.3°C. This cup would likely not be my first choice if I wanted my drink to stay hot as long as possible (I would instead recommend like a thicker double-walled vessel with screw-on lid, for example, a Zojirushi, Yeti, or Tiger thermos). While I do generally prefer the KeepCup's drinking experience over a more traditional thermos, there is a trade-off in heat retention. I think it is also worth mentioning that James Hoffmann did a similar test in his "The Best Reusable Coffee Cups - 2019 Edition" video on YT, at the 2:54 mark there is a chart of detailing insulation results for the various cups tested, including a 6oz KeepCup Thermal. Per his test, and starting with water at 158°F/70°C, the 6oz cup was down to 141.8°F/61°C after 10 minutes, 136.4°F/58°C after 20, and 131.9°F/55.5°C after 30 - so it would seem that the larger 12oz Thermal model does have slightly better heat retention than the smaller 6oz cup.

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KeepCup Thermal - Vacuum Insulated Reusable Coffee Cup with Splashproof Sipper Lid | M 12oz/340ml - Black

Product ID: 334626760

Details

Brand
KeepCup
Capacity
340 ml
Colour
Black
Material
Stainless
Special features
BPS/BPA-free

💧Splashproof press-fit lid

❄️Vacuum insulation for hours

🛡️18/8 stainless steel durability

€ 118.64

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Description

☕ Elevate your coffee ritual—sip smarter, live cooler.

EFFORTLESS ELEGANCE - Lightweight, ergonomic, and fits all standard cup holders for seamless daily carry.
TEMPERATURE LOCKED IN - Double-walled vacuum insulation keeps your coffee hot or cold for hours—no compromises.
BARISTA GRADE COFFEE ANYWHERE - Enjoy café-quality taste with the iconic barista standard design, perfect for home or on-the-go.
BUILT TO LAST DESIGNED TO LOVE - Modular, BPA/BPS-free, and crafted from premium stainless steel for a lifetime of coffee adventures.
SIP SUSTAINABLY IMPRESS INSTANTLY - Make a positive impact after just 66 uses—ditch single-use waste with style.

KeepCup Thermal is a 12oz reusable coffee cup crafted from electropolished 18/8 stainless steel with double-wall vacuum insulation. Featuring a splashproof press-fit sipper lid and barista-standard design, it preserves pure coffee taste while keeping drinks hot or cold for hours. Lightweight and modular, it’s BPA/BPS-free and built for sustainable, stylish daily use.

Specifications

ASIN	B081R25Q7Q
Age Range Description	Adult
Best Sellers Rank	#172,974 in Kitchen ( See Top 100 in Kitchen ) #1,282 in Insulated Cups & Mugs
Brand Name	KeepCup
Capacity	340 ml
Color	Black
Customer Package Type	Standard Packaging
Customer Reviews	4.2 4.2 out of 5 stars (704)
Finish Types	Glossy
Global Trade Identification Number	09343243001719
Included Components	Cup, Lid, Plug
Is the item dishwasher safe?	Yes
Is the item microwaveable?	No
Item Dimensions W x H	8.4W x 13.2H centimeters
Item Type Name	KeepCup Thermal
Item Weight	0.24 Kilograms
Manufacturer	KeepCup
Manufacturer Part Number	TBLA12
Material Features	Insulated
Material Type	Stainless Steel
Material Type Free	BPA Free
Model Number	TBLA12
Number of Items	1
Occasion	Back To School, Birthday, Christmas, Travel, Work
Other Special Features of the Product	BPS/BPA-free, Vacuum Insulated
Pattern	Solid
Product Care Instructions	Hand Wash Only
Product Style	Medium
Recommended Uses For Product	Home, Indoor, Office, Outdoor, Travel
Reusability	Reusable
Shape	Cylindrical
Size	Medium (Pack of 1)
Specific Uses For Product	Coffee/Tea, Hot & Cold Drinks
Subject Character	KeepCup Thermal
Theme	Coffee, Cooking and Dining, Cups and Mugs, Home and Kitchen, Insulated Drinks Containers
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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€ 118.64

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

1 month ago

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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