"What kind of incense can I offer to Aphrodite? Thank you! :-)"
The Orphic incenses prescribe a hymn to Aphrodite, so as far as the go-to guide for incenses goes, the Orphic hymns aren't helpful. That said, there were a few staples. Frankincense (λίβανον) is one of them. Frankincense is tapped from the Boswellia sacra tree. The bark is stripped off, and the tree 'bleeds' tears of frankincense, which are allowed to harden before being cut off. There is great variety in quality--colour, purity, aroma, age, and shape--and, thus, in price. Another staple is Myrrh (σμύρναν). Myrrh is harvested in the same way frankincense is, and is commonly harvested from the species Commiphora myrrha. Myrrh gum is waxy, and coagulates quickly. It becomes rock hard very fast, and becomes glossy. The gum is yellowish, and may be either clear or opaque. It darkens deeply as it ages, and white streaks emerge.
Myrrh, especially, is connected to Aphrodite in legend. It's said that Myrrha (or Smyrna) was a young princess who refused to honour Aphrodite, and so She made her lust after her own father. Eventually, she was turned into the first Myrrh tree. Apollodorus, in his 'Bibliotheca':
"And Adonis, while still a boy, was wounded and killed in hunting by a boar through the anger of Artemis. Hesiod, however, affirms that he was a son of Phoenix and Alphesiboea; and Panyasis says that he was a son of Thias, king of Assyria, who had a daughter Smyrna. In consequence of the wrath of Aphrodite, for she did not honor the goddess, this Smyrna conceived a passion for her father, and with the complicity of her nurse she shared her father's bed without his knowledge for twelve nights. But when he was aware of it, he drew his sword and pursued her, and being overtaken she prayed to the gods that she might be invisible; so the gods in compassion turned her into the tree which they call smyrna. Ten months afterwards the tree burst and Adonis, as he is called, was born, whom for the sake of his beauty, while he was still an infant, Aphrodite hid in a chest unknown to the gods and entrusted to Persephone. But when Persephone beheld him, she would not give him back. The case being tried before Zeus, the year was divided into three parts, and the god ordained that Adonis should stay by himself for one part of the year, with Persephone for one part, and with Aphrodite for the remainder. However Adonis made over to Aphrodite his own share in addition; but afterwards in hunting he was gored and killed by a boar." [3.14.4]
"Hi, I watched your "making manna" video tutorial, and I couldn't really understand what you said was in the yellow glass bottle. What is it, and where can I get it?"
I had to watch my own video again to remember a yellow bottle, but I think I know what you mean. The yellow bottle is used to store my bio-ethanol, the burning agent I use when building a fire indoors. This is a form of biofuel (fuel derived from biological sources), and a variation of denatured alcohol. It's a clear, flammable liquid which burns without smoke and without scent. As such, it works very well for indoor use. Make sure to use a cast-iron or at least solid container to burn in!
"Is there a greek god of finding missing things?"
Not as far as I know, but in general, Gods and Goddesses whom you have built kharis with will help you when you are truly in need. From a purely personal perspective, Hermes would most likely be able to find your items, seeing as he's been known to hide (and steal) items Himself ;-)