F region Mug
That portion of the ionosphere existing between approximately 160 and 400 km above the surface of the Earth, consisting of layers of increased free-electron density caused by the ionizing effect of solar radiation. Note 1: The F region reflects normal-incident frequencies at or below the critical frequency (approximately 10 MHz) and partially absorbs waves of higher frequency. Note 2: The F1 layer exists from about 160 to 250 km above the surface of the Earth and only during daylight hours. Though fairly regular in its characteristics, it is not observable everywhere or on all days. The principal reflecting layer during the summer for paths of 2,000 to 3,500 km is the F1 layer. The F1 layer has approximately 5 ´ 105 e/cm3 (free electrons per cubic centimeter) at noontime and minimum sunspot activity, and increases to roughly 2 ´ 106 e/cm3 during maximum sunspot activity. The density falls off to below 104 e/cm3 at night. Note 3: The F1 layer merges into the F2 layer at night. Note 4: The F2 layer exists from about 250 to 400 km above the surface of the Earth. The F2 layer is the principal reflecting layer for HF communications during both day and night. The horizon-limited distance for one-hop F2 propagation is usually around 4,000 km. The F2 layer has about 106 e/cm3. However, variations are usually large, irregular, and particularly pronounced during magnetic storms.
The Urban Dictionary Mug
Customer Reviews

This is the coolest Anspaugh mug that ever existed.
Great ordering experience..good quality
8.3 cm diameter? I hardly know her
The day this mug entered my life, my depression was cured, I won the lottery, my dad came back from the dead, and my mum started loving me, motto beg but if you rub the mug 3 times a genie WIll grant you 69 wishes (I wished for more mugs 69 times)
Gift for my niece. She loves it.
I don’t really want to by it but I do like that you can customize it Also I do find find funny nearly all the one star reviews are people say “I want the mug for free”
i tried to break this shit mug but died got reincarnated came back to life and this shitty mug was still there
How many ounces does it hold? I don’t know ask him. HIM!HIM! Fuck him! It’s catchy
Great experience with the Urban Dictionary and ordering my mug. Any concerns that were related to them were received promptly. Overall, it was a great experience
i love this mug its not a mistake ITS A MASTERPIECE
Describes my classmate in school, perfect
I love the cup and I’m certain I’ll be checking with you guys in the future..
*To those looking to purchase, others may criticize your sense of humor.* I love the thug shaker mug! It stands out as a quality desk ornament that all of my co workers are envious of. However, the other world leaders seem to find the thug shaker unfunny and immature for the work place. My wife says she will leave me if she sees it out one more time. I think I may have to give up the thug shaker persona once and for all. Stay strong thugs.
fuck you and your mugs give me a shirt or ill shit on you
Love love love it! Customer service gave me a coupon, let me know that I had to revise the definition when too long, and overall super helpful.

Nice Mug my second Mug. A little staining or photo graphic stain on the side of the cup and shown in the picture. As a result I cannot give a 5 Star Review.
The snarky message on the mug always gets big laughs from guests so I'm now using it as my go-to bourbon glass
Love the coffee mug. Would have been nice to see who had the word accepted into Urban Dictionary printed on the bottom of the mug. As I was the one. "Dusty Dawg" Other than that I love.
fuck ur mugs i want one for free
This mug, much like a cursed relic unearthed from the depths of despair, embodies a cacophony of design flaws and manufacturing mishaps that make one wonder if it was birthed from the darkest corners of incompetence itself. From its deceptively promising exterior, which boasts a color scheme akin to a bruised banana left out in the sun for too long, to its handle that feels more like a medieval torture device designed to punish the unsuspecting hand that dares to grasp it, every aspect of this mug screams "regret." Its material, a sinister amalgamation of recycled nightmares and shattered dreams, leeches a flavor reminiscent of stale coffee mixed with the tears of disappointed souls into whatever liquid unfortunate enough to be poured within its cursed confines. The rim, jagged and uneven like the edge of a poorly forged blade, guarantees that each sip is a perilous journey fraught with the risk of lip lacerations and existential dread. And let us not forget the bottom of this vessel, where the manufacturer's logo is stamped with all the subtlety of a scarlet letter, branding the user as a victim of their own poor purchasing decisions for all eternity. Indeed, this mug serves as a stark reminder that sometimes, in the vast expanse of consumer goods, there exists a dark abyss where quality and utility fear to tread, leaving only disappointment and regret in their wake.
