The pula is the currency of Botswana. It has the ISO 4217 code BWP and is subdivided into 100 thebe. Pula literally means "rain" in Setswana, because rain is very scarce in Botswana — home to much of the Kalahari Desert — and therefore valuable and a blessing. The word also serves as the national motto of the country.
A sub-unit of the currency is known as thebe, or "shield", and represents defence. The names were picked with the help of the public.
In 1976, coins were introduced in denominations of 1, 5, 10, 25 and 50 thebe and 1 pula. The 1 thebe was struck in aluminium, with the 5 thebe in bronze and the others in cupro-nickel. These coins were round except for the scalloped 1 pula. Bronze, dodecagonal 2 thebe coins were introduced in 1981 and discontinued after 1985. In 1991, bronze-plated steel replaced bronze in the 5 thebe, nickel-plated steel replaced cupro-nickel in the 10, 25 and 50 thebe and the 1 pula changed to a smaller, nickel-brass, equilateral-curve seven-sided coin. A similarly shaped, nickel-brass 2 pula was introduced in 1994. In 2004, the composition was changed to brass-plated steel and the size was slightly reduced.
Following the withdrawal of the 1 and 2 thebe in 1991 and 1998 respectively, smaller 5, 10, 25 and 50 thebe coins were introduced, with the 5 and 25 thebe coins being seven-sided and the 10 and 50 thebe coins remaining round.  A bimetallic 5 pula depicting a mopane caterpillar and a branch of the mopane tree it feeds on was introduced in 2000 composed of a cupronickel center in a ring made of aluminium-nickel-bronze.
On 23 August 1976, the Bank of Botswana introduced notes in denominations of 1, 2, 5, and 10 pula; a 20 pula note followed on 16 February 1978. The 1 and 2 pula notes were replaced by coins in 1991 and 1994, whilst the first 50 and 100 pula notes were introduced on May 29, 1990 and August 23, 1993, respectively. The 5 pula note was replaced by a coin in 2000. The original 1, 2 and 5 pula banknotes were demonetised on 1 July 2011.
The current series of notes was introduced on 23 August 2009 and contains for the first time, a 200-pula banknote.
In response to the concern of the poor quality of the paper of the 10 pula banknote, the Bank of Botswana revealed a 10 pula banknote in polymer in November 2017 and was issued to the public on February 1, 2018.
^ abStandard Chartered Review. Standard Chartered Bank. 1976. p. 9. The new names pula and thebe were chosen following an invitation to the public to submit a their suggestions [...] The meaning of "thebe" is shield — the traditional means of defence.