The eBay item is NOT "Burmese ware". And I think Leni was spot on.
Perhaps Tiger's reference to the Great Glass site Webb's section was in relation to the couple of shaded white/lemon-to-yellow vases with enamelled floral decoration? At least, those are, I think, the closest comparison to the eBay one.
If anyone would like to add to, or correct, my comments below, please do so.
David H's point about the unfinished base is very pertinent in relation to Webb's. Another factor, partcularly when handling items like these, is that the English (and certainly (?) Webb's) versions will have a solid foot, whereas the Eurpean (Bohemian) items most often have a hollow foot and are usually mould formed. This is something that Cyril Manley commented on and does seem to be generally accurate.
Back to Burmese ware, there is another very obvious clue to say that the eBay item is not in this category. It has a white inner layer which is clearly seen in the folded rim. Burmese wares did not have a white inner. But Webb's "Peachblow" did, as did American versions of Peachblow. But Peachblow is not virtually-white shading to orange or yellow. It's the colour of peaches, shaded from "gentle" to "solid". So the eBay piece is not Peachblow, either.
In the Great Glass site, there are several examples of Burmese items shown and the difference between those and the eBay vase is very obvious.
A typical feature of items such as the eBay vase (or jug) is that the handle is frosted clear glass. English versions may also have used frosted handles, but the Bohemian (and later Czech ones??) seem to have made the most use of this.
We had a lengthy discussion on Burmese / Peachblow (etc) in a message some time ago, but I can't seem to locate it - maybe it was in the earlier version of the Board? But Jim Sapp posted a message in Sep 2005 (which I can't seem to get the link to!!) about his site for Burmese fairy lamps, which shows various examples of Webb's Burmese ( http://www.fairy-lamp.com/Fairylamp/WebbDecorationsFinal.html
A final point is that had the eBay jug-vase been Burmese, then at that size, it would have taken a bit more than £6.51 - more like £651.00!! Even so, the £6.51 was still relatively cheap, as similar items often (or used to) sell for up to £50 in UK fairs.