Voiceless bilabial stop. Send air through your mouth, now stop it, now start. If you vibrate your vocal cords you make a B. This is not that, keep your larynx still and put a little extra air into it. Perfect.
Carve a line down. Now carve a bent line at the top. Mirror that line on the bottom, make a cup on its side. You can put dice in it or a drink, it’s a toss up. Don’t spill.