Panvola What Part Of Don't You Understand Electrical Engineer Tumbler 20oz
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Shipping time
Printed to order: 3–7 business days to make, then 5–14 business days to arrive. Items shown as in stock ship sooner.
Arrived broken? We replace it
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- Free shipping on orders $75+
- Free damage replacement
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Description
Design
This tumbler puts "WHAT PART OF" across the top and "DON'T YOU UNDERSTAND?" along the bottom, with a dense block of hand-written math filling the space between them. It is one of the better electrical engineer gifts for someone who spends their day explaining a circuit to people who nod and then ask the same question again.
The print is white on the dark body, stacked in three bands: "WHAT PART OF" across the top in a heavy, condensed, tightly spaced all-caps sans-serif, the math block in the middle, and "DON'T YOU UNDERSTAND?" centered below in the same typeface at a slightly smaller size. The equations are hand-written in loose, slanted script with uneven baselines — derivatives and limits, trig identities, a summation sign, a double integral, π ≈ 3,1415, a radical, a quadratic line, and a small bracketed 3×3 matrix. Tucked in among them are a labeled right triangle and a sine wave sketched on an x–y axis, so the whole block reads like a working blackboard rather than one tidy proof.
This tumbler holds 20 oz and comes with a spill-resistant clear lid, so it carries coffee through a long lab morning and iced tea through an afternoon of drafting, and the included stainless steel straw makes it easy to drink from at a desk. It is a funny gift for an electrical engineer who already owns enough mugs and would rather have the joke on something insulated.
Perfect Gift For
- Electrical engineers — a good gift for an electrical engineer is something they will actually use at work, and this insulated tumbler goes from the office to the shop floor on birthdays, work anniversaries, or Christmas.
- Engineering students — for graduation or a first-semester care package, one of the more practical engineering gift ideas for someone who lives on cold coffee and late study sessions.
- Engineering professors and mentors — electrical engineering gifts with a sense of humor make better end-of-term thank-you presents than another desk plaque.
Product Details
- Material: Vacuum-insulated stainless steel
- Capacity: 20 oz
- Insulation: Keeps drinks hot for up to 12 hours and cold for up to 24 hours
- Lid: Spill-resistant clear lid
- BPA Free: Yes
Why Customers Love It
⭐️⭐️⭐️⭐️⭐️ "This tumbler is absolutely perfect for anyone in the field! Aside from the great sarcastic humor, the quality is top-notch. It keeps drinks cold, the lid fits securely, and the included straw is a nice bonus. Highly recommend as a gift for students or professionals!"
Free shipping on orders $75+
Shipping
Free shipping on orders $75+
Most of our designs are printed to order. Production takes 3–7 business days (up to 12 in peak season), then shipping takes 5–14 business days depending on your location.
Items shown as in stock ship from our warehouse and arrive sooner.
Shipping cost and your delivery estimate are shown at checkout. Weather, carrier delays and customs can add time.
Returns & damage
Arrived broken, defective or wrong? Email [email protected] a photo whenever you notice it. We send a free replacement, or a refund if you prefer. You don't need to send the item back.
Changed your mind? Tumblers and other non-mug items can be returned within 30 days of delivery, unused and in their original packaging. Items shipped from our warehouse stock can be returned on the same terms, even mugs. Made-to-order mugs and personalized items can't be returned for a change of mind. We pay the return postage and email you a prepaid label.
Please email us before sending anything back: the return address depends on the warehouse that shipped your order. Read the full return and refund policy.
FAQ
How is the design printed?
Our supplier prints the design with 3D UV printing.
Is it dishwasher and microwave safe?
Our supplier lists this tumbler as hand wash only.
How much does it hold?
This tumbler holds 20oz.
What if it arrives damaged?
Email [email protected] with your order number and a photo of the problem. We'll send a free replacement, or a refund if you prefer, and you don't need to send it back. Full details are in our refund policy.
